★ Biconcave shape helps active and better absorption of oxygen from alveolus, it also provides more surface area and circulates swiftly through-out the body.
★ Whereas "Sickle-cell disease" of RBCs is named so because of its shape changed from biconcave to sickle-like. This shape not only actively absorbs oxygen but also can get stuck in the blood capillaries due to their pointed edges and a person suffering from sickle-cell disease is always at risk of unpredicted death.
★ Your body is creating and destroying 15 million red blood cells per second!
★ It takes about 20 seconds for a red blood cell to circle the whole body.
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