Coagulation of blood -hemostasis mechanism |body fluids and circulation| ncert class11|
Автор: Biology-Pro
Загружено: 2022-01-09
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Описание:
This lecture is about Coagulation of blood -hemostasis mechanism. coagulation of blood include 3 hemostasis mechanisms. which include
1.vasoconsriction
2.formation of plate let plug
3.mechanism of blood clot or clot of fibrin
a clot or coagulam formed mainly of a network of threads
called fibrins in which dead and damaged formed elements of blood are
trapped. Fibrins are formed by the conversion of inactive fibrinogens in
the plasma by the enzyme thrombin. Thrombins, in turn are formed from
another inactive substance present in the plasma called prothrombin. An
enzyme complex, thrombokinase, is required for the above reaction. This
complex is formed by a series of linked enzymic reactions (cascade
process) involving a number of factors present in the plasma in an inactive
state. An injury or a trauma stimulates the platelets in the blood to release
certain factors which activate the mechanism of coagulation.
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