phlebotomy - Collecting blood samples from patients for diagnostic testing  , Hematology - Study of blood and its components, fluid and cells  , Venipuncture - Phlebotomy; used to acquire the blood for test  , Erythrocytes - red blood cells,one of the formed elements of the blood , Leukocytes - white blood cells, one of the formed elements of the blood , Thrombocytes - Cellular fragments; plays an important role in blood coagulation, hemostatsis, and clot formation  , Plasma - Fluid that provides a matrix for blood cells, electrolytes, proteins and chemicals to travel throughout the body via the blood vessels , Serum - Clear straw color red liquid that is left after the clot is formed , Centrifuge - A machine that spins the test tube of blood, causing the blood to separate according to weight , Anticoagulant - Chemical in a blood tube that prevents the clotting of the blood by removing the calcium from the blood by removing the calcium from the blood or by stopping the formation  , Leukocyte (white blood cell) function - Body defense (extravascular), Erythrocytes (red blood cell) function - Transport of oxygen and carbon dioxide (intravascular), Thrombocytes (platelets) function - Blood clotting, Preferred venipuncture site - Antecubital space, Most commonly used venipuncture site - Median cubital vein, Arteries - Carry blood from the heart, carry oxygenated blood, Veins - Carry blood to the heart, carry deoxygenated blood, Phlebotomist - Person trained to obtain blood specimens by venipuncture and capillary puncture techniques. Primary role is to collect blood. , Circulatory system - Consists of the heart and the vessels. The heart pumps blood through the body. , Alternative venipuncture site when arms are not available - The veins of the feet are an alternative when the arms are not available. ,

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