[BITList] How Different Parts Of Our Body Age At Different Times

[FA]

I think most of us are well aware most aspects of the aging process 
having been there done that
frank



*_Different Parts of Our Body Age At Different 
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*We all accept that getting older is inevitable. A leading clinicians 
have revealed the exact age when different body parts start to decline, 
most alarming being the brain and lungs.

French doctors have found that the quality of men's sperm starts to 
deteriorate by 35, so that by the time a man is 45 a third of 
pregnancies end in miscarriage. Here, with the help of leading 
clinicians, Angela Epstein tells the Daily Mail the ages when different 
parts of the body start to lose their battle with time.
*
BRAIN -*Starts aging at 20
**As we get older, the number of nerve cells - or neurons - in the brain 
decrease. We start with around 100 billion, but in our 20s this number 
starts to decline. By 40, we could be losing up to 10,000 per day, 
affecting memory, co-ordination and brain function.
**
*GUT -*Starts aging at 55.
**A healthy gut has a good balance between harmful and 'friendly' 
bacteria. But levels of friendly bacteria in the gut drop significantly 
after 55, particularly in the large intestine, says Tom MacDonald, 
professor of immunology at Barts And The London medical school. As a 
result, we suffer from poor digestion and an increased risk of gut 
disease. Constipation is more likely as we age, as the flow of digestive 
juices from the stomach, liver, pancreas and small intestine slows down.
*
BREASTS -*Start aging at 35
**BY their mid-30s, woman's breasts start losing tissue and fat, 
reducing size and fullness. Sagging starts properly at 40 and the 
aureole (the area surrounding the nipple) can shrink considerably.
**
*BLADDER -*Starts aging at 65
**Loss of bladder control is more likely when you hit 65. Women are more 
vulnerable to bladder problems as, after the menopause, declining 
estrogen levels make tissues in the urethra - the tube through which 
urine passes - thinner and weaker, reducing bladder support. Bladder 
capacity in an older adult generally is about half that of a younger 
person - about two cups in a 30-year-old and one cup in a 70-year-old. ...
****
*LUNGS *- Start aging at 20
**Lung capacity slowly starts to decrease from the age of 20. By the age 
of 40, some people are already experiencing breathlessness. This is 
partly because the muscles and the rib cage which control breathing 
stiffen up.
*
VOICE -*Starts aging at 65
**Our voices become quieter and hoarser with age. The soft tissues in 
the voice box (larynx) weaken, affecting the pitch, loudness and quality 
of the voice. A woman's voice may become huskier and lower in pitch, 
whereas a man's might become thinner and higher.
****
*EYES -*Start aging at 40
**Glasses are the norm for many over-40s as failing eyesight kicks in - 
usually long-sightedness, affecting our ability to see objects up close.
****
*HEART -*Starts aging at 40
**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.
****
*LIVER - *Starts aging at 70
**This is the only organ in the body which seems to defy the aging process.
****
*KIDNEYS -*Starts aging at 50
**With kidneys, the number of filtering units (nephrons) that remove 
waste from the bloodstream starts to reduce in middle age.
****
*PROSTATE- *Starts aging at 50
**The prostate often becomes enlarged with age, leading to problems such 
as increased need to urinate, says Professor Roger Kirby, director of 
the Prostate Centre in London . 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.
**
*BONES- *Start aging at 35
**'Throughout our life, old bone is broken down by cells called 
osteoclasts and replaced by bone-building cells called osteoblasts - a 
process called bone turnover,' explains Robert Moots, professor of 
rheumatology at Aintree University Hospital in Liverpool . Children's 
bone growth is rapid - the skeleton takes just two years to renew itself 
completely. In adults, this can take ten years. Until our mid-20s, bone 
density is still increasing. But at 35 bone loss begins as part of the 
natural aging process.
*
TEETH - *Start aging 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.
**
*MUSCLES- *Start aging 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.
*
HEARING- *Starts aging mid-50s
**More than half of people over 60 lose hearing because of their age, 
according to the Royal National Institute for the Deaf.
****
*SKIN- *Starts aging mid-20s
**The skin starts to age naturally in your mid-20s.
*
TASTE AND SMELL- *Start aging 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.
****
*FERTILITY*- Starts aging at 35
**Female fertility begins to decline after 35, as the number and quality 
of eggs in the ovaries start to fall. The lining of the womb may become 
thinner, making it less likely for a fertilized egg to take, and also 
creating an environment hostile to sperm.
*
HAIR - *Starts aging at 30
**Male hair loss usually begins in the 30s. Hair is made in tiny pouches 
just under the skin's surface, known as follices. A hair normally grows 
from each follicle for about three years, is then shed, and a new hair 
grows. Most people will have some grey hair by the age of 35. When we 
are young, our hair is coloured by the pigments produced by cells in the 
hair follicle known as melanocytes.* 
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