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Circulatory System
circulatory system basics
| Term | Definition |
|---|---|
| circulatory system | transports materials through the body |
| transport | movement from place to place |
| cardiovascular system | another name for circulatory system |
| 3 main parts of circulatory system | heart, blood vessels, blood |
| heart | muscle with 4 chambers (right/left atrium and right/left ventricle) that pumps blood throughout the body |
| blood vessels | tubes that carry blood |
| arteries | vessels that carry blood AWAY from the heart (thickest vessels) |
| veins | vessels that carry blood TOWARD the heart (thinner than arteries, thicker than capillaries) |
| capillaries | tiny blood vessels with thin walls that allow substances to exchange between blood vessels and individual body cells |
| blood | fluid that transports |
| plasma | liquid part of blood |
| hemoglobin | red part of blood, carries oxygen & carbon dioxide |
| platelets | help blood to clot and fight infection |
| 4 main blood types | A, B, AB, O |
| blood pressure | the force (pressure) of blood leaving and entering the heart |
| typical/average healthy blood pressure | approximately 120/80 but varies |