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Circulatory Systems
| Term | Definition |
|---|---|
| Cardiovascular system | The body system that consists of the heart, blood vessels, and blood; circulatory system. |
| Heart | A hollow, muscular organ that pumps blood throughout the body. |
| Atrium | Each of the two upper chambers of the heart that recives blood that comes into the heart. |
| Pacemaker | A group of cells located in the right atrium that sends out signals that make the heart muscle contract and that regulates hearteat rate. |
| Ventricle | A lower chamber pof the heart that pumps blood out to the lungs and body. |
| Valve | A flap of tissue in the heart or a vein that prevents blood from flowing backward. |
| Artery | A blood vessel that carries blood away from the heart. |
| Capillary | A tiny blood vessel where substances are exchanged between the blood and the body cells. |
| Vein | A blood vessel that carries blood back to the heart. |
| Aorta | The largest artery in the human body. |
| Coronary Artery | An artery that supplies blood to the heart itself. |
| Pulse | The alternating expansion and relaxation of an artery wall as blood travels through an artery. |
| Diffusion | The process by which molecules move from an area of higher concentration to an area with a low amount of concentration. |
| Pressure | The force excerted on a surface divided by the total area over which the force is exerted |
| Blood Pressure | The pressure that is excerted by the blood against the walls of blood vessels. |
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FuntomFive
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