Question

Explain blood clotting with major events taking place in it.

Answer 1

• A blood clot forms when blood cells and fibrin strands clump together.
• A clot that blocks blood flow is called a thrombus. Injured tissues and platelets release the clotting factor prothrombin activator and calcium ions.
• Prothrombin activator converts the blood protein prothrombin to thrombin.

Thrombin splits fibrinogen to form fibrin.

• Fibrin fibers form a mesh over the wound, trapping red blood cells and platelets and the bleeding stops.
• The clot hardens and becomes smaller. New cells grow to the repair the wound site and enzymes plasmin is released to dissolve the clot.