| A | B |
| cardiac | relating to the heart |
| artery | blood vessel that carries blood away from the heart |
| capillary | blood vessel with a wall one cell thick through which oxygen and food molecules pass to body cells |
| vein | blood vessel that carries blood to the heart |
| hemoglobin | a substance in red blood cells that carries oxygen |
| plasma | the liquid part of blood, contains salts and various proteins |
| platelet | a tiny piece of cell that helps form clots |
| vein | blood vessel that carries blood to the heart |
| systolic | top number in blood pressure measurement, when the heart contracts |
| diastolic | bottom number in blood pressure measurement, when the heart relaxes |
| white blood cells | fight infection |
| red blood cells | contain hemoglobin, a protein that binds oxygen. Red blood cells transport oxygen to, and remove carbon dioxide from, the body tissues |
| Blood Group A | A antigens on the surface of your red blood cells and B antibodies in your blood plasma |
| Blood Group B | B antigens on the surface of your red blood cells and A antibodies in your blood plasma |
| Blood Group AB | Both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma |
| Blood Group O | Neither A nor B antigens on the surface of your red blood cells, but both A and B antibodies in your blood plasma |
| antigen | a substance that when introduced into the body stimulates the production of an antibody |
| antibody | various bodies or substances in the blood which act in antagonism to harmful foreign bodies |
| universal donor | person with type O blood |
| universal receiver | person with AB blood |