also known as red blood cells (RBC) are mature red blood cells produced by the red bone marrow. The primary role of these cells is to transport oxygen to the tissues. The oxygen is transported by the heomglobin. Make up 45% of total blood volume.
white blood cells; fight infections and are formed in the bone marrow. Make up 1% of total blood volume.
AKA platelets, blood cells which are necessary for clotting.
straw-colored fluid that makes up about 55 percent of blood, liquid portion of the blood containing water, proteins, salts, nutrients, hormones, vitamins, and Clotting factors. Transports RBC's, WBC's and platelets throughout the circulatory system.
Plasma with the clotting factors removed. Serum is often used in diagnostic tests because it does not clot.