Lectures Tagged with: Blood type

Platelet And Blood Group

Platelets are cytoplasmic fragments of extraordinarily large cells called megakaryocytes. Their granules contain lots of chemicals that act in the clotting process, (including serotonin, Ca2+, a variety of enzymes, ADP, and platelet derived growth factor (PDGF)). Platelets play an important role in hemostasis. Blood type is based on the presence of 2 major antigens in RBC membranes-- A and B.