Question

Why is blood needed by all parts of the body?

Answer 1

Blood is needed by all parts of the body because it serves the following functions:

1. Blood carries oxygen from the lungs to tissues and takes away carbon dioxide to the lungs for exhalation.
2. Blood transports nutrients absorbed from food to every cell in the body.
3. Blood transports a number of hormones and necessary chemicals.
4. Blood transports metabolic wastes to the excretory organs for excretion.
5. Blood helps protect the body against foreign microorganisms.