| A | B |
|---|
| Receives blood from all parts of body | right atrium |
| Receives oxygenated blood from the lungs | left atrium |
| Pumps deoxygenated blood to the lungs | right ventricle |
| Pumps oxygenated blood to all parts of the body | left ventricle |
| largest artery in the body | aorta |
| vein collecting blood from head and arms | superior vena cava |
| Blood vessels supplying oxygen to the myocardium | coronary arteries |
| Blood vessel taking deoxygenated blood to the lungs | pulmonary artery |
| Valve between left atrium and left ventricle | bicuspid or mitral valve |
| Valve leading out of left ventricle | aortic valve |
| Double fluid-filled sac surrounding heart | pericardium |
| Layer of pericardium which sticks to the surface of the heart | visceral |
| Tough outer layer of pericardial sac | fibrous |
| Layer of muscle in heart wall | myocardium |
| Keep cuspid valves from regurgitating into the atria | chordae tendinae and papillary muscles |
| Semilunar valves | aortic and pulmonary |
| Valve does not close completely | insufficiency (incompetence) |
| Valve is narrowed; does not open completely | stenosis |
| coronary thrombosis | clot in a coronary artery |
| angina pectoris | pain in the chest |
| death of heart muscle | myocardial infarction |
| hardened arteries, due to buildup of plaque | atherosclerosis |
| Where blood becomes oxygenated | capillaries of lungs |
| Vessels which carry blood away from heart | arteries |
| Vessels carrying blood toward the heart | veins |
| Smallest blood vessels, where exchange of gases occurs | capillaries |
