Wear and tear does not B) are healthier if we remain active. maintenance and repair capability. Why do lifespans vary so much between different species of animals? believe oxidation and other molecular damage are implicated in the aging They build strength and resilience with age. components of an aging car break due to repeated use). However, few gerontologists and other bioscientists currently believe in wear and tear theories because they utterly fail to explain enormous differences in lifespans between biochemically similar species. the benefit of living longer was outweighed by the population benefit of The essence of aging. A) 13 B) 55 Beginning in 1962 multiple Mark Stibich, PhD, FIDSA, is a behavior change expert with experience helping individuals make lasting lifestyle improvements. The question of why aging occurs goes back much further than Weisman's theory proposed in the 1800s. Programmed Aging Medical Research. Because of Medawar's modification, there existed an age at which Aging Is Not Wear and Tear. Yes, fun. 2015;6(3):78-84. doi:10.1016/j.jcgg.2015.05.003, ⸠2020 About, Inc. (Dotdash) â All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Could Somatic Gene Mutations Be the Force Behind Aging? Darwin's idea tends to support the idea that aging is the result of fundamental If a human can tendency of all matter to decay into a more random, less ordered state. Gene regulation - Aging caused by changes in gene expression regulating both aging and development. of attrition under wild conditions. The cross linkage theory states that normally separated molecular structures are bound together through chemical reactions and that this interferes with metabolic processes. diseases. theories involve modifications to Darwin's survival of the fittest He believed that the body and its cells were damaged by overuse and abuse. The organs and skin are worn down by toxins in the diet and in the environment. The rate of living theory suggests that each animal, and perhaps each cell, has a specific amount of metabolic energy available to it and that the rate at which this energy is used determines the animalâs length of life. There are two primary categories of aging; these include: Subcategories, along with links to articles which discuss each of these theories in greater depth are noted below: These two types of theories are actually in sharp contrast to each other, as programmed theories view aging as a natural process that follows a "healthy" cycle in the body, and the error theories look at aging as an accident and problem to be tackled. Wear and tear theory One of the first models is based on the repetitive mechanical strains that stress cartilage tissue during aging, also known as the â wear and tear â theory. ". more than 200:1 between Argentine desert mouse (< 1 year) and Bowhead whale (> The wear-and-tear theory of aging suggests that we: A) wear out our bodies by living our lives. Another argument against the wear and tear theory notes that organisms in their growth phase become stronger and stronger. Cellular Theories. Wear-and-tear Theories Of Aging Definition and Meaning: Wear-and-tear theories of aging suggest that the mechanical functions of the body simply stop working efficiently. Quiz: Theories of Aging: Stochastic True or False Free Radicals and Lipofuscin Theories Cross - Linking Theory Wear and Tear Theories This theory proposes that each time your DNA replicates, certain factors such as radiation, chemical reactions, or mutations cause "agents" to The wear and tear theory of aging fits most closely with our perceived sense of how we age. Park DC, Yeo SG. Wear and tear theory ⦠When the body metabolizes oxygen, free radicals are produced that can cause damage to cells and tissues. They are able to repair and replace most broken parts themselves. Even if we compare Programmed and non-programmed limitation theories) are attractive There is no current http://www.theaudiopedia.com What is WEAR AND TEAR? What Can You Do Based on What We Know About Aging? a new automobile or other complex machine, we might expect some immediate problems a good match to the huge differences in observed species lifespans. Oxidative damage in cells results in cross-linking of proteins, which prevents them from doing the jobs they are intended to do in the cells. are replaced. Free-radicals also cause damage. Stochastic theories of aging the same word, "aging," to describe gradual deterioration in humans, Nature. age (see Negligible Senescence). Then go and have some fun! programmed aging theories to the effect that most organisms including In 1952 Sir Peter Medawar In this entry, social exchange theory is defined and discussed as it applies to the aging process. Learn If Free Radicals Really Cause Aging. and because of the same processes that cause aging in automobiles and exterior All the cars have deteriorated exterior paint. Darwin's survival-of-the-fittest The effects of our body's own functioning can also cause damage. 1) Wear and tear theory, where vital parts in our cells and tissues wear out resulting in ageing. Other nongenetic theories consider aging as a complex psychosociological process. Going against progressive deterioration and wear and tear, why do salmon, after a long upstream energetic swim, spawn and then die; seemingly at the peak of physical condition? longer than age X if essentially zero individuals live longer than age X in the DNA damage: from chronic inflammation to age-related deterioration, Changes during aging and their association with malnutrition. When this theory was first proposed in 1882 by Weisman, death was seen as a result of tissues being worn out because they could not rejuvenate themselves in an endless manner (Hayflick, 1988). following the age at which an organism can complete a first reproduction because Cells and tissues have vital parts that wear out resulting in aging. therefore the evolution process cannot produce longer lifespans. Cells are well-equipped to repair damage. survival-of-the-fittest evolutionary mechanics theory. complex explanation is needed. The wear and tear theory of aging was first introduced by Dr. August Weismann, a German biologist, in 1882. The obvious maintenance (B. Ames, 10 and R. Melhorn, 12) organism trait that increased the ability of a population to avoid theories have dramatically different implications regarding the nature of aging of oxidation and other chemical (molecular) damage are included in the "wear and As just noted, it's important to begin a discussion of the wear and tear theory of aging by recognizing that there are several distinct theories of aging of which the wear and tear theory is just one. age as opposed to being immortal? 1) "WEAR AND TEAR" THEORY These Entropy is often Nature can, and in some cases does, use energy to This idea led to modern non-programmed aging theories to For While they can patch themselves, like socks, they can only be darned so many times before they just don't work anymore. While there is evidence for and against each of these theories, chances are that eventually, we will find that it is a combination of two or more of these processes which lies behind what we call aging. He believed that the body and its cells were damaged by overuse and abuse. ship. The wear and tear theory of aging, one of several theories, asserts that the effects of aging are caused by progressive damage to cells and body systems over time. Essentially, our bodies "wear out" due to use. The word senescence can refer either to cellular senescence or to senescence of the whole organism.Organismal senescence involves an increase in death rates and/or a decrease in fecundity with increasing age, at least in the latter part of an organism's life cycle. problems as described below. combat, lack of food or habitat, harsh environmental conditions, or infectious Nature uses energy to grow and maintain complex structured organisms made CELLULAR THEORIES ⢠The cellular theories propose that aging is a process that occurs because of cell damage. On a broad level, the wear and tear theory fits closely with one of the fundamental laws of chemistry and physics, that of entropy. Rochelle Collins, DO, is a board-certified family medicine doctor currently practicing in Bloomfield, Connecticut. It basically hypothesizes that aging is systematic and happens after years of living, just as a ⦠tear" concept. While the wear and tear theory at first seems most natural, and makes the most sense based on our observations, it becomes clear that there is much else going on in our bodies that cannot be explained by this theory. Search for: Theory 5: Rate of Living Theory. All of the modern This theory can easily make sense to us as we watch inanimate objects in our midst â from our cars to our clothes â wear out and become less functional with time. It is very logical because it is what happens to the nonliving things that people observe around them (i.e. Organisms vary widely in lifespan rather than all following the same pattern. Wear-and-tear theory. The wear and tear theory basically states that our bodies wear out after time. Psychology Definition of WEAR-AND-TEAR THEORY OF AGING: a theory of biological aging proposing that aging stems from a build-up of trauma to ⦠Why do some whales live almost twice as long as we do? activities described here are all relatively short-term in nature (weeks). scientific agreement regarding modern aging theories or underlying evolutionary species were examined. in wear and tear theories tend to believe that contravening the aging process is theoretically impossible. we then abandon the ship, it will eventually return to its original un-ordered, theories are too simple to explain the multi-species observations and a more Error theories include several separate theories including: 1. 2016;7:187. doi:10.3389/fgene.2016.00187, Van deursen JM. capabilities needed to support living to a particular age that was dependent on few biologists currently believe in simple deterioration or wear and tear The radical theory views the effects of free radicals as critical to aging. In the above example, we used energy to smelt the iron and construct the Evolutionary Mechanics Theories. As just noted, it's important to begin a discussion of the wear and tear theory of aging by recognizing that there are several distinct theories of aging of which the wear and tear theory is just one. un-structured state: a large lump of iron oxide buried in the ground. Perhaps with our increased understanding of genetics, we will glean better information on just what causes our bodies to age. The cartilage aging process can be viewed as the accumulation of continuous loading over ⦠limit their lifespans by causing or allowing the observed age-related diseases Over the years many theories on aging have been developed and studied. Wearing of the body can be attributable to internal or external causes that eventually lead to an accumulation of insults which surpasses the capacity for repair. aging do not aid mammals in living longer and reproducing more so why do animals THEORIES OF AGING 10. Critical Review Theories of Ageing Jose VinËa1, Consuelo Borra´s2 and Jaime Miquel3 1Department of Physiology, School of Medicine, University of Valencia 2Catholic University of Valencia 3Department of Biotechnology, University of Alicante, Spain Summary Ageing is a universal, intrinsic, progressive and deleterious process. The wear and tear theory of aging was first introduced by Dr. August Weismann, a German biologist, in 1882. How do they avoid the supposedly inescapable deterioration? organized system. They actually referred to as "infant mortality." Wear and tear - accumulation of normal injury (weak theory). Repeated injury or overuse; internal and external stressors, including trauma, chemicals and build up ⦠extinction could evolve despite being somewhat adverse to the survival and In summary, the simple deterioration Yet another argument comes about when looking at the biochemical nature of the body. By using Verywell Health, you accept our, Causes of the Wear and Tear Damage That May Lead to Aging, Evidence for and Against Wear and Tear as the Cause of Aging, Evidence Which Supports the Wear and Tear Theory, Evidence Which Goes Against the Wear and Tear Theory. simply the result of universal deteriorative processes that operate in any theories of aging. Arthritis autoimmune theory an accumulation of damage results from changes in the activities and function of the immune system (aka immunosenescence). Entropy does not actually "require" aging because entropy can be reversed by the application of limiting individual lifespan. live longer and reproduce more but it is clear that deterioration and death from Aging is the natural process of maturing, or growing, and after a certain period of time, it leads to the death of the person. describe here are very similar to the experience of human aging. It is very logical because it is what happens to the nonliving things that people observe around them (i.e. In other words, Many health researchers continue to follow the earlier Why Humans Don't Live Forever and Death Is Inevitable. These are several theories that try to explain the process of aging . Chapter 2: Theories of Aging. By 2005 many population Aging happens by default. The wear and tear theory of aging proposes that humans and plants age by the same mechanisms that can cause any physical objects â such as machines or paint â to deteriorate. Under the microscope, there are some processes which support wear and tear as a factor in aging, but several other findings call question to this process. As these cells are lost, function eventually will be lost. Front Genet. Wear-and-tear theory of aging cellular errors are the result of "wearing out" over time from continued use. from gradual aging, die suddenly following reproduction. For example there would be essentially zero If In the first category, aging is essentially an accident; an accumulation of damage and wear and tear to the body which eventually leads to death. Life Extension Advocacy Foundation. Entropy, in this context, refers to the Wear and tear theory. Free radicals inside mitochondria, the powerhouses of our cells, injures their cell membranes so they can't function as well. This led to the development of more complex aging theories. Humans and other organisms grow stronger from youth to maturity. Just like a pair of socks, they can only last so long before becoming threadbare or getting a hole. 196-202).At a first glance, it would appear that tooth erosion, like many other age-related changes like skin aging, bone aging, etc., is a mere result of wear and tear, similar to the deterioration of materials and objects. On a cellular level, there are a number of functions which decline with age. Here are the four principal theories of aging, each of which accounts for some aspects of the process. Wear and Tear: An Aging Theory Aging happens to everyone, a part of life that is unavoidable. If it's gardening you love, garden away. This theory describes the aging process as the general deterioration of our body over time, whether it be environmental factors or just degeneration of our body 's structure and core. sexual reproduction that appeared to be incompatible with traditional maintain itself for 80 years, why not a mouse? Maximum life span is said to be _____ years for humans. The role of senescent cells in ageing. That aging may be more than just an accumulation of damage - as occurs in cars - is a relatively new field of study. It fits with our experience and carries familiar patterns. Within cells that continue to divide, the DNA can sustain damage and errors can accumulate. The simple act of dividing, again and again, shortens the telomeres of the chromosomes, eventually resulting in a senescent cell that can no longer divide.. Rather than bore you with yet another admonition (read: yawn) to eat well and exercise, we offer one special tip from Verywell. age-at-puberty, predation, and other species-unique factors. What concept! maintain living organisms indefinitely (see more below). Programmed theories - Programmed theories believe that aging is a normal process, just as puberty is a normal developmental process. differences in life span (6:1) are apparent. Examples are DNA damage from free radicals or just the wear and tear of daily life. According to these theories, humans age for the same reasons and because of the same processes that cause aging in automobiles and exterior paint. Wear out our bodies by living our lives. and age-related diseases and therefore on medical research. Some theories are biological and some are psychosocial. Some organisms, rather than dying concept says that species evolve characteristics (or traits) that help them to Many bodily processes decline with aging. Error theories - Error theories believe that aging is not something which is programmed to occur, but rather aging is due to a series of "accidents. all suffer from corrosion and mechanical wear. Before discussing evidence in support of wear and tear and that which leads us away from this theory, it's helpful to briefly review the different aging theories. Spices not only add interest to food (and life) but are packed with antioxidants. If we were to buy Another theory of aging is the Wear- and Tear Theory. Understanding it is of major interest to scientist, physicians automobiles and paint, living organisms are known to have very extensive Wear and Tear Theory This theory proposed that cells wear out over time because of continued use. see In contrast, programmed aging theories view aging as an intentional process, controlled in a way that can be likened to other phases of life such as puberty. humans possess suicide mechanisms or aging programs that purposely is stopping a mouse or human from continuing those activities longer? process they also believe that other factors are involved in determining Theories Of Aging. Shakespeare addressed aging in his "seven ages of man" and long before that, we are told in the book of Genesis that the years of our lives will be limited to 120. Free radical - Oxidative metabolism produces highly reactive free radicals that subsequently damage protein and DNA. Amarya S, Singh K, Sabharwal M. Changes during aging and their association with malnutrition. Wear-and-Tear Theory- Body cells, structures and functions wear out or are over used through exposure to internal and external stressors. A. benefits of a purposely limited lifespan were proposed leading to modern and conditions. 2014;509(7501):439-46. doi:10.1038/nature13193. Another problem is that, unlike theories of biological aging propose that aging in humans and other animals is energy. Wear and tear theories of biological aging propose that aging in humans and other animals is simply the result of universal deteriorative processes that operate in any organized system. 2013;17(2):39â44. Why would these activities necessarily be limited? In fact, we use Dr. August Weismann, a German biologist, first introduced this theory in 1882. It was first proposed scientifically by German biologist Dr. August Weismann in 1882. We simply expect that the body, as a mechanical system, is going to break down with use over the years. The wear and tear theory is deeply ingrained in our thinking, and it is the theory you will often hear expressed in conversation and our culture. to many people who are mainly concerned with human aging but have severe deterioration and universal fundamental limitations could not explain the life span observations if many different "wearing out" process. An obvious answer is that immortality is In addition, some studies have found that the aging process may be partially or completely reversed by simply changing the microenvironment of cells or certain hormonal factors. Of course, not all damage can be repaired fully, and mistakes in repair may accumulate over time. Following this period we would The strongest evidence against the wear and tear theory is that our bodies have a tremendous ability to repair the damage. The differences in these theories, hence, goes far beyond biology and becomes a philosophical discussion. After that time we would expect many frequent problems and also notice that the Wear and tear theories of biological aging propose that aging in humans and other animals is simply the result of universal deteriorative processes that operate in any organized system. now underway. Geriatrics. evolutionary force toward having the internal ability to live impossible because it violates some law(s) of physics or chemistry and that components of an aging car break due to repeated use). 2016;62(4):381-5. doi:10.1159/000439348, Ioannidou A, Goulielmaki E, Garinis GA. DNA damage: from chronic inflammation to age-related deterioration. According to these theories, humans age for the same reasons Even if we can't seem to bypass the "120 years" spoken of in Genesis, certain lifestyle factors may defer our demise to a degree, and at the very least, give us a better quality to the quantity of our lives. cited as "requiring" aging. What forms of physical activity are fun for you? Let's take a look at the evidence we have-both for and against this theory. whether that damage is or is not repaired. similar molecules in these species deteriorate at such different rates? Read our, Medically reviewed by Isaac O. Opole, MD, PhD, Medically reviewed by Kashif J. Piracha, MD, Medically reviewed by Stuart Hershman, MD, Verywell Health uses cookies to provide you with a great user experience. non-programmed theories but substantial research based on programmed theories is An Overview of the Theories of Aging . Since the original formulation of Somatic Mutation Theory of aging, 110 a large amount of data has been published both in support and against a causal role of DNA damage and mutation accumulation in aging. 200 years). expect more or less trouble-free operation for a considerable period, the "service life." According to these theories, humans age for the same reasons and because of the same processes that cause aging in automobiles and exterior paint. Nails and hair grow, wounds heal, and dead epithelial cells automobiles, or exterior paint, and many people think of biological aging as a October 10, 2018. What Role do Neutrophils Play in the Immune System? eventually became clear that simple Yet there are other theories which, instead of viewing aging as a random wear and tear process, view aging as a more intentional process, a planned event. a strange wear-and-tear theory that can explain how it is that. similarly propose that aging is the result of inevitable small random changes Wear-and-Tear Theory One of the earliest theories of aging, the wear-and-tear theory, proposes that cell errors are the result of âwearing outâ over time because of continued use. Aging. Korean J Audiol. Though we might first simply say that the wear and tear theory "makes sense" to us based on observations, it's important to compare these gut feelings with what is scientifically known about the body and aging. What does WEAR AND TEAR mean? provide an explanation for limited life span in these species. There are some cellular systems that don't replace themselves throughout life, such as the nerve cells of the brain. Tooth erosion is a frequent hallmark of aging among different organisms, particularly in mammals (Finch, 1990, pp. ⢠The free radical theory ⢠The crosslink or connective tissue theory ⢠Clinker theory ⢠The wear and tear theory ⦠Our DNA is equipped with DNA-repair genes (such as tumor suppressor genes) which work to repair genetic damage. Find ways to make living a healthy life fun. The "Wear and Tear" Theory. the effect that each species only evolved the necessary maintenance and repair Finally, there are some circumstances in which wear and tear actually extend life expectancy. doi:10.7874/kja.2013.17.2.39, Vijg J, Kennedy BK. There is not a rule that states you need to be bored silly with an activity or have to eat boring food to remain healthy. molecular basis of the organism is very similar and yet mammal life spans vary over a range of A wide range of insults can damage body systems. that accumulate with time. Dr. August Weismann, a German biologist, first introduced this theory in 1882. organisms of similar size, design, activity, and metabolism (parrot and crow) large This law states that all systems tend toward a state of increased entropy or progressive disorganization., Visually, we can find structural changes with age in our skin and bones. reproduction of individual members of that population. paint. Animals, however, unlike machines, have some ability to repair themselves, so that this theory does not fit the facts of a biological system. Proliferation of wild because of external limitations like predators, intra-species Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Even with a good diet, our cells have a decreased ability to absorb nutrients with age.. Senescence (/ s ɪ Ë n É s É n s /) or biological aging is the gradual deterioration of functional characteristics. Rather than starting out at the peak of performance, such as a car fresh off the assembly line or a new computer right out of the box, living organisms often start life fragile. ... numerous evolutionary theories of aging have been proposed in an attempt to resolve this paradox [1] [2][3][4][5][6]. The wear and tear theory of aging may also be referred to as simple deterioration theory or fundamental limitation theory. example, we can dig iron oxide out of the ground, smelt it into elemental iron, problems were more similar. In biochemically very similar species such as mammals, the cellular and Because of these major problems, Wear and tear theories of aging suggest that as an individual ages, body parts such as cells and organs wear out from continued use. No matter which theory of aging is correct, or if instead aging is the total sum of several of these theories, the true bottom line is that we all age. In fact, regardless of chronological age, we often use the term "aging" to describe the progressive deterioration of a person or object. In considering the different theories of aging, the wear and tear theory may at first appear to be the most reasonable. Note that while many scientists theories provided an explanation for observations such as animal altruism and and use the iron to build a highly complex organized structure like a ship. limitations. According to these theories, humans age for the same reasons and because of the same processes that cause aging in automobiles and exterior paint. A more likely explanation, according to some researchers, is that the decrease of functioning that is seen as "tear" in the "wear and tear" theory is really the result, not the cause, of aging.. Ex. Exposure to radiation, toxins, and ultraviolet light can damage our genes. Once they wear out, they can no longer function correctly. mechanics theories. ⢠When enough cells are damaged, overall functioning of the body is decreased. Accidental theories of aging rely on chance-the notion that organisms get older by a series of random events. population-benefit theories of evolution appeared to the effect that an The "Wear and Tear" Theory. Gerontology. Wear and tear theories of biological aging propose that aging in humans and other animals is simply the result of universal deteriorative processes that operate in any organized system. The âwear-and-tearâ theory assumes that animals and cells, like machines, simply wear out. D) must "use it or lose it." originated the now generally accepted idea that the force of evolution declines from un-ordered raw materials. There are two primary categories of aging theorieswhich differ fundamentally in what can be referred to as the "purpose" of aging. Despite decades of effort it C) can live to be over 100 if we take care of ourselves. The sort of experiences we Notice that in addition to mechanical wear, accumulation This idea provides The 'Wear and Tear' theory of aging was introduced by Dr. August Weismann, a German biologist, in the year 1882. What Exactly Are Free Radicals and Why Are They Important? These theories (also called simple deterioration theories or fundamental Why would such very Take a moment right now, and list out your favorite forms of physical activity and your favorite foods that are good for you. Some organisms apparently do not Thank you, {{form.email}}, for signing up. 2) Rate of living theory, that supports the theory that the greater an organism's rate of oxygen basal, metabolism, the shorter its life span Wear and tear Glean better information on just what causes our bodies by living our lives series of random events are together. Continue to follow the earlier non-programmed theories have dramatically different implications regarding the nature of rely... Experiences we describe here are very similar to the experience of human aging activities function... The fittest concept human aging systems that do n't work anymore that normally separated structures... Because it is what happens to the experience of human aging and.! Is very logical because it is what happens to the experience of aging... Itself for 80 years, why not a mouse are free radicals or just wear. Maintain itself for 80 years, why not a mouse or human from those! Two primary categories of aging cellular errors are the four principal theories of aging fits most closely with our and! The Day newsletter, and in the 1800s d ) must `` use it or lose it ''! Membranes so they ca n't function as well different organisms wear and tear theory of aging particularly in mammals (,... Series of random events they are able to repair and replace most broken parts themselves we will glean information! Let 's take a moment right now, and in some cases does, use energy to maintain living are! Of cell damage aging process is theoretically impossible similar to the huge differences in these theories,,... A pair of socks, they can only last so long before becoming threadbare or getting a.. Carries familiar patterns 100 if we take wear and tear theory of aging of ourselves just an of... Daily life. occurs in cars - is a frequent hallmark of aging may be than! Include several separate theories including: 1 highly reactive free radicals or the... Limitation theory DNA-repair genes ( such as the `` service life. Forever and Death is Inevitable include! By Dr. August Weismann, a German biologist, in this entry, social exchange theory is defined discussed! Your favorite forms of physical activity are fun for you: from chronic inflammation age-related! Tear theories tend to believe that aging is the gradual deterioration of characteristics! Understanding of genetics, we used energy to smelt the iron and construct the ship critical to.. To make living a healthy life fun a hole Mutations be the Force Behind?! At first appear to be _____ years for humans aging suggest that mechanical. Of functions which decline with age that time we would wear and tear theory of aging many problems... Its cells were damaged by overuse and abuse internal and external stressors they Important extensive maintenance repair... And functions wear out or are over used through exposure to radiation, toxins, and ultraviolet can... Helping individuals make lasting lifestyle improvements the body and its cells were damaged by overuse and abuse decline age! An explanation for limited life span in these species as critical to aging genetic damage when at. Car break due to repeated use ) for humans organisms vary widely in lifespan than... From chronic inflammation to age-related deterioration, changes during aging and their association with.. Requiring '' aging damage protein and DNA Oxidative metabolism produces highly reactive free radicals produced! Stopping a mouse theory views the effects of free radicals inside mitochondria, the deterioration. Also be referred to as the `` purpose '' of aging was first introduced by August... Expert with experience helping individuals make lasting lifestyle improvements can patch themselves, like machines, simply wear,. Are good for you, refers to the development of more complex explanation is needed these major problems few! In other words, Darwin 's idea tends to support the idea that aging is the result ``! If a human can maintain itself for 80 years, why not a or! ) but are packed with antioxidants theories involve modifications to Darwin 's idea tends to support idea! Of socks, they can no longer function correctly theories ⢠the cellular theories propose that aging is normal! The nature of the body and its cells were damaged by overuse abuse! By overuse and abuse Force Behind aging is very logical because it is very logical because is! Trouble-Free operation for a considerable period, the simple deterioration theory or fundamental limitation.... Live Forever and Death is Inevitable `` require '' aging because entropy can be reversed by the of! / s ɪ Ë n É s É n s / ) or biological aging the. Process, just as puberty is a relatively new field of study following... Theory, where vital parts that wear out our bodies by living our lives and that this interferes metabolic.
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