Blood cell

[1] Red blood cells or erythrocytes primarily carry oxygen and collect carbon dioxide through the use of hemoglobin.

Red blood cells are circular, biconcave, disk-shaped and deformable to allow them to squeeze through narrow capillaries.

RBCs are formed in the red bone marrow from hematopoietic stem cells in a process known as erythropoiesis.

There are a variety of types of white blood cells that serve specific roles in the human immune system.

[4] White blood cells are divided into granulocytes and agranulocytes, distinguished by the presence or absence of granules in the cytoplasm.

There are individual terms for the lack or overabundance of specific types of white blood cells.

The number of white blood cells in circulation is commonly increased in the incidence of infection.

There are disorders that reduce the number of platelets, such as heparin-induced thrombocytopenia (HIT) or thrombotic thrombocytopenic purpura (TTP), that typically cause thromboses, or clots, instead of bleeding.

Both of these growth factors have been shown to play a significant role in the repair and regeneration of connective tissues.

Local application of these factors in increased concentrations through platelet-rich plasma (PRP) has been used as an adjunct to wound healing for several decades.

The following year leukocytes were first observed by Gabriel Andral, a French professor of medicine, and William Addison, a British physician, simultaneously.