Perhaps you already know, which blood group you belong to: A, B, AB, O, Rhesus + Rhesus + (Rhesus Positive), or Rhesus – (Rhesus Negative). But do you know what these letters and signs mean? Although all human blood looks the same when see under a microscope, we do not all have the same type of blood. Some substances, found …
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Blood plays vital role in the life of our body. It is a fluid that circulates through the heart and blood vessels, supplying nutritive materials to every part of the body and carrying off waste products. It is colorless fluid, plasma, in which float myriads of corpuscles. There are of three kinds: red, white and platelets. Learn More: Blood is …
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A blood donor can give about half a litre of blood. The blood is kept for transfusions to help save people’s lives. The body then makes more blood, but the donor should not give blood again for at least two months. Every year on 14 June, countries around the world celebrate World Blood Donor Day.
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There almost 5 liters of blood in the human adult’s body. But it is not the only fluid to circulate. A substance called ‘lymph’ circulates through a network of vessels throughout the body.
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