Biology
State any five functions of the blood.
Circulatory System
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Answer
Five functions of blood are as follows:
- Transport of digested food (in the form of simple sugars like glucose, amino acids, vitamins, mineral salts, etc.) from the alimentary canal to the tissues.
- Transport of oxygen from the lungs to the tissues. It occurs by means of red blood cells in combination with haemoglobin in the form of an unstable compound oxyhaemoglobin, which on reaching the tissues breaks up to deliver oxygen.
- Transport of carbon dioxide from the tissues to the lungs. It occurs partly in combination with haemoglobin and partly as solution in blood plasma.
- Transport of excretory material from the tissues to the liver, kidney or the skin for elimination or to render them harmless.
- Its white blood corpuscles protect the body from diseases by engulfing bacteria which may have entered the body.
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