The 70% Watery Human

The amount of water in the human body, averaging 70%, varies
considerably and even from one part of the body to another area
(illustration on right). A lean man may hold 70% of his weight in body
water, while a woman – because of her larger proportion of water-poor
fatty tissues – may be only 52% water. The lowering of the water
content in the blood is what triggers the hypothalamus, the brain’s
thirst center, to send out its familiar urgent demand for a drink of water.

Water Percentage in Various Body Parts:

Teeth .....................10% Lungs ............... 80%
Bones .....................22% Brain................. 75%
Cartilage ................ 55% Bile ................... 86%
Red blood corpuscles ...... 68.7% Plasma ............. 90%
Liver .................... 71.5% Blood ................ 83%
Muscle tissue ..............75% Lymph .............. 94%
Spleen ..................... 75.5%

This chart shows why 8 glasses of water daily is important.