| A | B |
| capillary | blood vessel through which oxygen and carbon dioxide move to and from cells |
| artery | blood vessel with the thickest walls |
| vein | blood vessel that has valves to help blood flow in one direction |
| arteriole | small vessel taking blood away from the heart |
| venule | small blood vessel taking blood toward the heart |
| mediastinum | center of thorax, contains heart and great vessels |
| dyspnea | difficulty breathing |
| tachycardia | fast heart rate |
| arrhythmia | irregular heart rate or rhythm |
| coronary | pertaining to the heart |
| sinus rhythm | normal heart rate and rhythm, 60 - 100 beats/minute |
| myocardial | pertaining to heart muscle |
| infarction | death of tissue, due to decreased oxygen delivered to the tissue |
| systole | contraction of the myocardium |
| diastole | relaxation of the myocardium |
| pulmonary | pertaining to the lungs |
| bradypnea | slow breathing |
| asthma | a condition in which the airways tighten, decreasing air flow |
| coagulation | clotting of blood |
| ABO group | Blood types based on antigens on the rbcs |