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74Why do we age?
The science and study of aging is called gerontology. There is no single cause for ageing and is a matter of intense research and debate. Several theories of ageing have been postulated. These are categorised...
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51Have a Health Heart
The heart is a pump divided into 4 chambers. It circulates blood throughout the body with repeated, rhythmic contractions. It picks up oxygen from the lungs as we breathe and circulates this oxygen...
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