11-05-2013, 03:42 PM | #11 |
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Re: How our body ages
The heart pumps blood less effectively around the body as we get older. This is because blood vessels become less elastic, while arteries can harden or become blocked because of fatty deposits forming on the coronary arteries -- caused by eating too much saturated fat. The blood supply to the heart is then reduced, resulting in painful angina. Men over 45 and women over 55 are at greater risk of a heart attack. |
11-05-2013, 03:42 PM | #12 |
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Re: How our body ages
LIVER - Starts ageing at 70
This is the only organ in the body which seems to defy the aging process. |
11-05-2013, 03:43 PM | #13 |
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Re: How our body ages
KIDNEYS - Starts ageing at 50
With kidneys, the number of filtering units (nephrons) that remove waste from the bloodstream starts to reduce in middle age. |
11-05-2013, 03:44 PM | #14 |
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PROSTATE - Starts ageing at 50
The prostate often becomes enlarged with age, leading to problems such as increased need to urinate. This is known as benign prostatic hyperplasia and affects half of men over 50, but rarely those under 40. It occurs when the prostate absorbs large amounts of the male sex hormone testosterone, which increases the growth of cells in the prostate. A normal prostate is the size of a walnut, but the condition can increase this to the size of a tangerine. |
11-05-2013, 03:44 PM | #15 |
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Re: How our body ages
BONES - Start ageing at 35
'Throughout our life, old bones are broken down by cells called osteoclasts and replaced by bone-building cells called osteoblasts -- a process called 礎one turnover'. Children's bone growth is rapid - the skeleton takes just two years to renew itself completely. In adults, this can take 10 years. Until our mid-20s, bone density is still increasing. But at 35, bone loss begins as part of the natural ageing process. |
11-05-2013, 03:44 PM | #16 |
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TEETH - Start ageing at 40
As we age, we produce less saliva, which washes away bacteria, so teeth and gums are more vulnerable to decay. Receding gums - when tissue is lost from gums around the teeth - is common in adults over 40. |
11-05-2013, 03:44 PM | #17 |
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Re: How our body ages
MUSCLES - Start ageing at 30
Muscle is constantly being built up and broken down, a process which is well balanced in young adults. However, by the time we're 30, breakdown is greater than buildup, explains Professor Robert Moots. Once adults reach 40, they start to lose between 0.5 and 2 per cent of their muscle each year. Regular exercise can help prevent this. |
11-05-2013, 03:44 PM | #18 |
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Re: How our body ages
HEARING - Starts ageing mid-50s
More than half of people over 60 lose hearing because of their age, according to the Royal National Institute for the Deaf. |
11-05-2013, 03:45 PM | #19 |
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Re: How our body ages
SKIN - Starts ageing mid-20s
The skin starts to age naturally in your mid-20s. |
11-05-2013, 03:45 PM | #20 |
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Re: How our body ages
TASTE AND SMELL - Start ageing at 60
We start out in life with about 10,000 taste buds scattered on the tongue. This number can halve later in life. After we turn 60, taste and smell gradually decline, partly as a result of the normal ageing process. |
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