Circulatory System
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Created by:
Ebigelow1998 on December 13, 2010
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30 terms
Terms | Definitions |
|---|---|
 Cardiovascular System | The body system that consists of the heart, blood vessels, and blood, and that carries needed substances to cells and carries waste products away. |
| Heart | A hollow, muscular organ that pumps blood throughout the body. |
| Atrium | each of the two upper chambers of the heart that receive blood that comes into the heart. |
| Ventricle | each of the two lower chambers of the heart that pumps blood out of the heart. |
| Valve | a flap of tissue in the heart or vein that prevents blood from flowing backward. |
| Pacemaker | a group of cells located in the right atrium that sends out signal that make the heart muscles contract and that regulates the heartbeat rate |
| Artery | a blood vessel that carries blood away from the heart |
| Capillary | a tiny blood vessel where substances are exchanged between blood and body cells |
| Vein | A blood vessel that carries blood back to the heart |
| Aorta | the largest artery in the body |
| Force | a push or pull |
| coronary artery | An artery that supplies blood to the heart itself |
| diffusion | the process by which molecules move from an area in which they are highly concentrated to an area where 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 blood vessels |
| sphygmomanometer | an instrument that measures blood pressure. |
| plasma | the liquid part of blood |
| red blood cell | a cell in the blood that takes up oxygen in the lungs and delivers it to cells elsewhere in the body |
| hemoglobin | an iron-containing protein that binds chemically to oxygen molecules and makes up most red blood cells |
| white blood cells | a blood cell that fights disease |
| platelet | a cell fragment that plays an important part in forming blood clots |
| fibrin | a chemical that is important in blood clotting because it forms a fiber net that traps red blood cells |
| blood transfusion | the transference of blood from one person to another |
| lymphatic system | a network of vein like vessels that returns the fluid that leaks out of the blood vessels to the blood stream. |
| lymph | the fluid that the lymphatic system collects and returns to the blood stream |
| lymph node | a small knob of tissue in the lymphatic system that filters the lymph |
| atherosclerosis | a condition in which an artery wall thickens as a result of the buildup of the fatty materials |
| cholesterol | a waxy fat-like substance found only in animal products that is an important part of your body's cells; can build up on artery walls |
| heart attack | a condition in which blood flow to a part of the heart muscle is blocked which causes heart cells to die. |
| hypertension | a disorder in which a person's blood pressure is constantly higher than normal |
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