| A | B |
|---|
| left ventricle | chamber with the thickest walls |
| stroke volume | amount of blood pumped out by a ventrical with each heart beat |
| bradycardia | a heart rate that is substantially slower than normal |
| pulmonary vein | carries oxygenated blood form the lungs to the left atrium |
| myocardium | layer of the heart wall that contains cardiac muscle tissue |
| inferior vena cava | the vessel that drains blood from lower parts and empties into atrium |
| QRS | the EKG wave that results from the deolarization of the ventricles |
| aldosterone | causes blood volume to increase |
| ventricular diastole | the part of the cardiac cycle when the bicaspid and tricuspid valves are open |
