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Oriole - HS heart
heart structures (internal & external) and flow of blood
| apex | the V-shaped point of the heart |
| auricles | flap-like extensions of the atria that increase their storage volume |
| bicuspid valve | keeps blood from flowing back into the left atrium when the heart contracts |
| chorae tendinea | "heartstrings" that stabilize atrioventricular valves during systole |
| interventricular septum | layer of heart muscle that separates the left and right "pump" chambers |
| left atrium | receives and pools oxygen rich blood coming back to the heart from the lungs |
| left ventricle | "pump" chamber that forces blood into the systemic circuit |
| myocardium | literally "muscle of the heart" |
| papillary muscles | found inside the ventricles; pull on the "heartstrings" in keeping the AV valves from everting |
| pulmonary arteries | left and right ones carry blood from the heart to the lungs |
| pulmonary semilunar valve | blocks oxygen-poor blood from flowing back into the heart when it relaxes |
| pulmonary trunk | short blood vessel headed toward the lungs that splits into left and right parts |
| pulmonary veins | carries blood from the lungs to the heart |
| right atrium | receives and pools oxygen poor blood coming back to the heart from the systemic circuit |
| right ventricle | "pump" chamber that forces blood into the pulmonary circuit |
| tricuspid valve | keeps blood from flowing back into the right atrium when the heart contracts |
| vena cavae | blood vessels that carry blood from the body back to the right atrium |
| aorta | major vessel that supplies blood to the head, arms, trunk, and legs |
| aortic semilunar valve | prevents oxygen-rich blood from flowing back into the heart as it relaxes |