The total blood volume is about 5 liters, and this amount is pumped by the heart once every minute. The stroke volume is about 70 ml per beat ejected about 72 times each minute. The arterioles are the resistance vessels. Normally they are widely open to permit free perfusion of tissues.

Health miracles of drinking adequate water include:

1 Prevent coronary artery disease, hypertension and diabetes.
2. Prevents Strokes and diabetes.
3. Prevents Osteoporosis and Arthritis. .
4. Preserves skin texture
5. Prevents kidney problems.
6. Prevents constipation, and
7. Reduces Stress, Depression and Anxiety.

These are some of the important body functions regulated by water for which it has to be maintained in adequate quantities.