NEET BIOLOGY

Detailed explanation-1: -Platelets are irregularly shaped fragments of cells that circulate in the blood until they are either activated to form a blood clot or are removed by the spleen. Thrombocytopenia is a condition of low levels of platelets and carries an increased risk of bleeding.

Detailed explanation-2: -Platelets are tiny, irregularly shaped blood cell pieces (called fragments) that play an important role in the making of blood clots. When an injury occurs and a blood clot is needed, the platelets become sticky and help plug the site of the injury.

Detailed explanation-3: -Thrombocytes, or platelets, are not complete cells, but are small fragments of very large cells called megakaryocytes. Megakaryocytes develop from hemocytoblasts in the red bone marrow. Thrombocytes become sticky and clump together to form platelet plugs that close breaks and tears in blood vessels.