Zoology - Body Fluids and Circulation Question with Solution | TestHub

Coagulation of blood is to prevent loss of excess blood by formation of clot or coagulum. This is a network of threads called fibrins in which dead and damaged formed elements are trapped. The mechanism is as follows:$\mathrm{a})$An injury or trauma stimulates the platelets to release thromboplastins which activates the process of coagulation,$\mathrm{b})$Thromboplastins help in formation of the enzyme complex thrombokinase and this begins the cascade process.$\mathrm{c})$Thrombokinase converts inactive protein prothrombin present in the plasma into thrombin.$\mathrm{d})$Thrombin converts soluble fibrinogen into insoluble fibrin. This is done with the help of Calcium ions.$\mathrm{e})$Fibrin forms a network of threads which trap the formed elements and finally forms a clot.