Platelets

Platelets are cell-like structures found in the blood that are essential for clotting and hemostasis. Platelets are incredibly small – much smaller than red or white blood cells – and they are only a few micrometers in diameter. They are important because they can sense when damage has occurred to a blood vessel, and they release substances that stimulate clot formation. Platelets also play a role in inflammation by releasing substances that recruit inflammatory cells to the area of injury. Platelets are used in numerous medical procedures, including wound healing, organ and tissue transplantation, and in the treatment of certain bleeding disorders.