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| consists of heart, b-vessels, and blood. carries needed substances to cells and carries waste products away from cells (AKA circulatory system) |
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| a group of heart cells that send out signals that make the heart muscle contract. located in right atrium of heart |
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| the pressure that is exerted by the blood against the walls of b-vessels |
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| a cell fragment that plays an important part in forming blood clots |
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| a flap of tissue that prevents blood from flowing backward. located b/w the ventricles and the large b-vessels that carry blood away from the heart |
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| the largest artery in the body |
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| an artery that supplies blood to the heart itself |
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| the alternating expansion and relaxation of an artery wall as blood travels through an artery |
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| an iron containing protein that binds chemically to oxygen molecules. makes up most of red b-cells |
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| a blood vessel that carries blood back to the heart |
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| tiny, narrow vessels where substances are exchanged b/w the blood and body cells |
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| a blood vessel that carries blood away from the heart |
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| functions of the cardiovascular system |
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| 1. delivering needed materials 2. removing waste products 3. fighting diseases |
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| located in center of chest. size of fist |
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| each time the heart beats, it pushes blood through the b-vessels of the cardiovascular system |
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| differences b/w veins, capillaries, and arteries |
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| capillaraies: 1 cell thick, materials are exchanged b/w body and b-cells........ arteries: 3 cell layers....caries blood away from heart.......veins: large...3 cell layers..... carries blood to heart |
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| blood types 1 can safely rec'v in blood transfusion |
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Definition
| A: a,o B: b,o AB: a,b,ab,o O: o |
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| function of lymphatic system and lymph nodes |
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Definition
| system: netwokr of veinlike vessels that returns the fluid to the bloodstream nodes: filter lymph, trapping bacteria and other disease-causing microorganisms in the fluid |
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