Question

Why it is essential for oxygen to reach each and every cell of the body.{short answer type}

Answer 1

it is essential because they act as a starter for the cell to function properly.

hope this may help you

Answer 2

As blood passes through the lungs, the haemoglobin picks up oxygen because of the increased oxygen pressure in the capillaries of the lungs, and can then release this oxygen to body cells where the oxygen pressure in the tissues is lower. ... The carbon dioxide is then released once the red blood cells reach the lungs.