Blood is the red fluid that circulates in our blood vessels, i.e.veins and arteries. The main function of blood is to act as the body’s transport system, but it also has a major role in the body’s defense against infection. There is no substitute for blood. It cannot be made or manufactured. Donors are the only source of blood for patients who need it.

One unit of Blood can be separated into the following components:

Blood cells are produced in bone marrow

Plasma carries blood cells

Red blood cells carries oxygen

White cells defend the body