A&P CH13 Cardiovascular System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| arteriole | a small branch of an artery that communicates with a capillary network
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| atrium | chamber of heart that receives blood from veins
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| capillary | a small blood vessel that connects an arteriole and a venule
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| cardiac conduction system | system of specialized cardiac muscle fibers that conducts cardiac impulses from the S-A node into the myocardium
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| cardiac cycle | a series of myocardial contractions and relaxations that constitutes a complete heartbeat
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| cardiac output | the volume of blood per minute pumped by the heart (calculated by multiplying stroke volume in milliliters by heart rate in beats per minutes
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| diastole | phase of the cardiac cycle when a heart chamber wall relaxes
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| electrocardiogram (ECG | a recording of the electrical activity associated with the heartbeat
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| endocardium | inner lining of the heart chambers
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| epicardium | the visceral portion of the pericardium on the surface of the heart
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| functional syncytium | merging cells performing as a unit; those of the heart are joined electrically
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| myocardium | muscle tissue of the heart
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| pericardium | serous membrane that surrounds the heart
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| peripheral resistance | resistance to blood flow due to friction between the blood and the walls of the blood vessels
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| pulmonary circuit | system of blood vessels that carries blood between the heart and the lungs
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| systemic circuit | the vessels that conduct blood between the heart and all body tissues except the lungs
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| systole | phase of the cardiac cycle when a heart chamber wall contracts
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| vasoconstriction | a decrease in the diameter of a blood vessel
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| vasodilation | an increase in the diameter of a blood vessel
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| ventricle | a cavity, such as brain ventricles filled with cerebrospinal fluid, or heart ventricles that contain blood
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| venule | a vessel that carries blood from capillaries to a vein
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| viscosity | the tendency for a fluid to resist flowing due to the internal friction of its molecules
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