There are four components - or parts - of the blood: red blood cells, white blood cells, plasma and platelets. Blood carries things you need, like oxygen and glucose, and waste products ...

White blood cells circulate in the blood and lymphatic ... mucous membranes, and various components of the immune system. Acquired immunity comes from vaccines and exposure to diseases.

For the time being, 19,000 liters of red blood cell containing components, are stored permanently and are ready for release at any time, Eikhler said. There are also kept 7,500 liters of red blood ...

Our blood consists of many cell types that develop through different stages from a precursor type -- the blood stem cell. An international research team has now investigated the developmental pathways ...