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Fascinating Medical Facts

Here are some fascinating facts about medicine and the medical world.

Baldness

Alopecia is the medical term for baldness (loss of hair from the scalp).

The boby of an adult has about 5 litres of blood in it.

There are four blood groups, A, B, AB and O.

A healthy person's blood pressure should range from 100-140mm when their heart contracts, and 60-90mm when it relaxes.

The total length of the blood vessels in the body an average sized human being is around 100,000 km.

There are a total of 206 bones in the human body.

Ten times as many men as women are color blind.

People become warm when doing exercise as muscles produce heat when they use energy.

Nails grow at about half a millimeter per week.

To smile you use 17 muscles and to frown you use 43 muscles.