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.
