ANATOMY

Detailed explanation-1: -A platelet plug is formed, and the external bleeding stops. Next, small molecules, called clotting factors, cause strands of blood-borne materials, called fibrin, to stick together and seal the inside of the wound. Eventually, the cut blood vessel heals and the blood clot dissolves after a few days.

Detailed explanation-2: -Platelets clump together to form a plug to close the wound. A clot then forms over the top. The injury heals and the clot dissolves. The platelet plug can’t last very long by itself, so a stronger clot is needed to completely stop the bleeding.

Detailed explanation-3: -Thromboplastin converts prothrombin in the plasma to thrombin. Vitamin K and Calcium ions are essential for the synthesis of prothrombin. Thrombin further converts the fibrinogen in the plasma to fibrin. Then, a blood clot is formed by the entangling of platelets and red blood cells in the fibrin network.