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| a thick layer of muscle in the heart |
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| flaps of connective tissue that prevent the back flow of blood |
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| pumps deoxygenated blood to the lungs to exchange gases and pick up oxygen |
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| returns oxygen rich blood back to the body |
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| fluid made mostly of water |
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| attack bacteria; fight parasites; guard against infection |
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| make clotting possible with the help of plasma proteins |
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| carry blood away from the heart |
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| the largest blood vessel that carries blood from the heart to the rest of the body |
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| small blood vessels; site of the gas and nutrient exchange between cells and the blood stream |
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| carry blood toward the heart |
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| fatty deposits build up on the walls of the arteries and prevent blood flow |
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| the fluid lost from blood |
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| air moves through the nose to this tube |
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| where air moves from the pharynx |
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| contains 2 highly elastic folds of tissue called vocal cords and also known as voice box |
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| 2 large passageways in the chest cavity |
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| The division after bronchi; tiny air sacs |
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| large flat muscle at the bottom of the chest cavity |
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