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APSM Biology 2.6
APSM CA Biology 2.6 Circulation
| Term | Definition |
|---|---|
| arteries | thick-walled vessels that carry blood away from the heart |
| atria | upper chambers of the heart |
| atrioventricular node | causes ventricles to contract |
| blood pressure | force that blood exerts upon walls of blood vessels |
| capillaries | Tiniest blood vessels allow for transfer of dissolved materials to tissues |
| diastolic | bottom number in blood pressure reading; pressure in arteries while heart is resting in between beats |
| myocardium | middle layer of heart, contains actual heart muscle tissue |
| pulmonary circulation | movement of blood between heart and lungs |
| sinoatrial node | part of cardiac conduction system that functions as heart’s pacemaker |
| sphygmomanometer | Measures blood pressure |
| systemic circulation | movement of blood through all parts of body except the lungs |
| systolic | top number of a blood pressure reading; pressure experienced by arteries while heart is beating |
| veins | thin-walled vessel that carry blood to the heart |
| ventricles | thick walled, lower chambers of the heart; bigger than atria |