| A | B |
|---|
| Atrium | upper receiving chamber of the heart |
| Ventricle | lower pumping chamber of the heart |
| Artery | carries blood away from the heart |
| Vein | Carries blood towards the heart |
| Capillary | one cell thick; allows for exchange of materials with tissues |
| Erythrocyte | Red blood cell |
| Leukocyte | White blood cell |
| Platelet | Cell fragment that clots blood |
| Valve | prevents the backflow of blood |
| Pulmonary circulation | Circulation of blood between the heart and lungs |
| Systemic circulation | Circulation between the heart and body except the lungs |
| Sinoatrial node | Pacemaker; initiates contraction of the atria |
| Atrioventricular node | initiates contraction of the ventricles |
| Blood pressure | Force with which the blood leaves the heart |
| Myogenic muscle contraction | Contraction of cardiac muscle without nervous stimulation |
| Plasma | Nonliving, liquid part of blood |
| Cardiac cycle | Series of events that make up one heartbeat |
| Systole | Contraction of the heart chambers |
| Diastole | Relaxation of the heart chambers |
| Atherosclerosis | Build-up of plaque in blood vessels |
| Plaque | Consists of lipids, cholesterol, cell debris, & calcium |
| Endothelium | Inner lining of an artery |
| Aorta | Largest artery leaving the heart |
| Coronary arteries | Arteries that provide the heart with oxygen & nutrients |
| Coronary thrombosis | Blockage of a coronary artery |
