A&P CH13 key terms Word Scramble
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Term | Definition |
arteriole | a small branch of an artery that communicates with a capillary network |
atrium | chamber of heart that receives blood from veins |
capillary | a small blood vessel that connects an arteriole and a venule |
cardiac conduction system | system of specialized cardiac muscle fibers that conducts cardiac impulses from the S-A node into the myocardium |
cardiac cycle | a series of myocardial contractions and relaxations that constitutes a complete heartbeat |
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 |
diastole | phase of the cardiac cycle when a heart chamber wall relaxes |
electrocardiogram (ECG | a recording of the electrical activity associated with the heartbeat |
endocardium | inner lining of the heart chambers |
epicardium | the visceral portion of the pericardium on the surface of the heart |
functional syncytium | merging cells performing as a unit; those of the heart are joined electrically |
myocardium | muscle tissue of the heart |
pericardium | serous membrane that surrounds the heart |
peripheral resistance | resistance to blood flow due to friction between the blood and the walls of the blood vessels |
pulmonary circuit | system of blood vessels that carries blood between the heart and the lungs |
systemic circuit | the vessels that conduct blood between the heart and all body tissues except the lungs |
systole | phase of the cardiac cycle when a heart chamber wall contracts |
vasoconstriction | a decrease in the diameter of a blood vessel |
vasodilation | an increase in the diameter of a blood vessel |
ventricle | a cavity, such as brain ventricles filled with cerebrospinal fluid, or heart ventricles that contain blood |
venule | a vessel that carries blood from capillaries to a vein |
viscosity | the tendency for a fluid to resist flowing due to the internal friction of its molecules |
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djhockett5
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