''Water''

Your body is mainly made

of water more than sixty percent.

You can survive weeks without food

but no more than a few days without water.

You gain water by drinking and eating and

as a by product of cell activity.

You lose water by sweating and

breathing and in your urine and feces.

The water balance in the body is controlled

mainly by the kidneys and adtenal glands.

In addition, if you drink a lot of water the saltiness of

the blood is diluted watered down. To restore the balance

the kidneys let out a lot of water as urine.