Question

How the blood is donated from one person to another ?​

Answer 1

Blood is drawn out through a vein in the arm, and a machine separates out the needed component (usually platelets, although red blood cells, white blood cells, and plasma can also be collected this way). The rest of the blood is then returned to the donor, usually through a vein in the other arm.

Answer 2

Explanation:

Blood is drawn out through a vein in the arm, and a machine separates out the needed component (usually platelets, although red blood cells, white blood cells, and plasma can also be collected this way). The rest of the blood is then returned to the donor, usually through a vein in the other arm.