| Term | Definition |
|---|
| cardiovascular system | carries needed substances to cells and carries wast products away from cells |
| heart | a hallow, muscular organ that pumpes blood throughout the body |
| atrium | receives blood that comes into the heart |
| ventricles | pump blood out of the heart |
| valve | a flap of tissue that prevents blood from flowing backward |
| 2 main phases of the heart | the heart muscle relaves and the atria fill with blood-- the atria contract and fill the tricles and ventricles contract to pump blood forward |
| pacemaker | sends out signals that make the heart muscle contract |
| arteries | blood vessels that carry blood away from the heart |
| capillaries | substances are exchanged between the blood and body cells |
| veins | the vessels that carry blood back to the heart |
| aorta | the largest artey in the body |
| force | a push or pull |
| coronary arteries | carry blood to the heart itself |
| pulse | caused by the alternating expansion and relaxation of the artery wall |
| diffusion | the process by which molecules move from an area in which they are less concentrated |
| pressure | the force that something exerts over a given area |
| blood pressure | the pressure that is exerted by the blood against the walls of the blood vessels |
| sphygmomanameter | an instrument that measures blood pressure |
Combine with other sets
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