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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 |