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| 1. |
Write about Clotting of blood in 50 words??????????????????????????? |
| Answer» Blood Clotting As the blood flow out from damaged blood vessel and comes in contact with external air,ruptured blood platelets of injured tissue release a substance called thromboplastin.It in the presence of Ca and few clotting factors converts prothrombin to thrombin.Prothrombin is a protein present in blood plasma.\xa0Thrombin then hydrolysis fibrinogen(large soluble protein present in blood plasma)The soluble fibrinogen is converted into insoluble fibrin by the action of thrombin. Fibrin forms needle like fibres.These fibres form a mesh work into which RBC become trapped and blood clot is formed(thick jelly which closes the ruptured blood vessel so that blood stop flowing) | |