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chapter 8 cardiovascular system

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Across
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muscular pump that propels blood to the entire body
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Study of the heart
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generates weak electrical impulses on the surface of the body.
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Sinoatrial node
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surge of blood felt in the arteries when blood is pumped from the heart
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Capillaries merge to form larger blood vessels
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Heart is enclosed in a sac
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Middle layer, composed of smooth muscle
Down
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heart to body cells through a vast network of blood vessels
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Small structure that prevents backflow
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Upper portion of the right atrium
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Arteries branch into smaller vessels until they become microscopic vessels
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Membrane that lines the four chambers of the heart
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Force exerted by blood against the arterial walls
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Returns blood to the heart