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Human Aging Process: How Do We Age

Updated on June 10, 2013
The Aging Process in Humans
The Aging Process in Humans

What is Aging?

Aging is a programmed biological process which involves gradual physiological changes throughout life. The changes occur from hormonal decline and the wear and tear of the body. As people age, many changes occur in our bodies. The characteristics of our organs begin to change. There is loss of collagen and elasticity in our tissues and skin. Calcium depletes from our bones and our blood vessels become hardened. There is a decrease in visual acuity, hearing and the vital capacity of the lungs. Flexibility of the musculoskeletal system declines and the person’s physical appearance changes as collagen and elastin in the skin is depleted. Even though the internal changes are not visible with the naked eye, they still exist and are uncontrollable.

Research has proven that the kidneys will only function for 120 years in the presence of good health and lifestyle conditions; after which they will cease to fu

This confirms that aging is programmed and can be considered to occur by chance. Environmental factors can affect the programmed DNA structure and function resulting in damage to our cells. This can lead to various diseases such as cancers.


Age is inevitable despite efforts to find ways to minimize the effects or slow the process down. Various theories of aging have evolved, but there is no definitive theory that is accepted to substantiate the basic process of aging. Scientists have attested that aging is the only phenomenon that ensures survival of human beings.

The aging process starts from birth to senescence and involves a process of physiological changes throughout life. The biological concept of species survival consider the fertile years as the most valuable period in life. In fact, natures’ biological clock prepares the body for reproduction in the first half of life. The most vitality, productivity and fertility occur during early life in which the body starts to decline in its function by the age of 40. However, age is beneficial to nature in order to nurture the young and guide them with valuable experience that was gained from wisdom.

Other Theories of Aging

There are four basic theories of aging, (click to learn more):


How long do you want to live?

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  • profile image

    Trayonne 5 years ago

    The whole growing up process is natual all kinds of people go through it well no kinds but everyone goes through it and if you stay healthy now you wont look like that latter on in life ... And your body starts to give out on you so stay heally emotionally and physically

  • Alex-Zander profile image

    Alex-Zander 5 years ago from Florida

    It doesn't sound too optimistic, alphagirl. 40 is a great time to begin the fight. first - hormones, got to balance them, second - fix those wrinkles - it will make you feel good about yourself, not mentioning losing weight. And of course, deal with stress, take good supplements.

  • Alex-Zander profile image

    Alex-Zander 6 years ago from Florida

    You are absolutely right Alpha girl. A lot of it have to do with genetics. Thanks God we can alter genetics now.

  • alphagirl profile image

    alphagirl 6 years ago from USA

    After 40 it is genetics , stress, environmental, lifestyle....I think much depends on how happy you are within, having friends and some family to rely on. Great hub!