What are platelets? What is their function? How do they do so? [3 MARKS]

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Blood is a liquid which has cells of various kinds suspended in it. The major types of cells in the blood include - red blood cells, white blood cells and platelets.
Platelets help our body form clots to stop bleeding.
If one of the blood vessels gets damaged, it sends out signals that are picked up by platelets. The platelets then rush to the site of damage and form a plug, or clot, to repair the damage.

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