How does the body repair damaged tissues and cells? - FamousWhy
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How does the body repair damaged tissues and cells?

 Q:   Ask a Question about How does the body repair damaged tissues and cells?       
How does the body repair damaged tissues and cells? Cells are able to divide very quickly to replace those that are old or have died. Nerve cells are the only ones that cannot be replaced. However, even nerve cells can sometimes grow new connections if the long fibres along which messages are passed becomes damaged.

Dead and dying cells are removed by white blood cells in the blood stream, which actually eat them. The liver is also able to break down red blood cells, which are only able to survive for a short time.

Why does the body have skin?

Skin is a flexible, waterproof covering that protects us from the outside world. It events harmful germs from entering the body. Skin is your largest organ, and it is sensitive to touch, temperature and pain. Your skin tells you what is happening around your body, so you can avoid inj uring yourself.

Also it helps to prevent damage from the Sun's harmful ultraviolet rays. Skin also helps to regulate body temperature by sweating and flushing to lose heat when you get too hot.

How do cuts and grazes heal?

When you cut or graze yourself, the blood clots to prevent bleeding. Clotting is caused by substances in the blood.Together with small particles called platelets, these substances produce masses of fine fibres when they are exposed to air. They block the wound and prevent more blood loss.

New cells grow rapidly into the wound, replacing the damaged tissue. Soon the clotted material, called a scab, falls off and clean, new skin is revealed underneath.


Tags: body, cells, healing



Category: Education  - ( Education Archive)

Date Added: 22 December '11


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