Sweating

There are over 2.5 million sweat glands. They are all over the body, large numbers are in the armpits (axilla), groin, forhead, palms of the hands and soles of the feet. We lose heat from the body as heat is needed to evapourate the sweat from the skin. In areas that are very arid (dry) we sweat freely and can lose so much as to cause heat exhaustion or severe dehydration.

Sweating is divided into two types

Insensible

All the time unnoticed much evapourated before it reaches the skin surface

Sensible

When the body is likely to become overheated because of exercise or in a hot atmosphere

Sweating is not under concious control
1.5 litres/day
Maximum loss about 10 litres with 30 grams of salt in a day (In very hot air conditions)
9/12