Term
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Definition
| upper right or left chamber of the heart |
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Definition
| membrane lining the cavities of the heart |
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Definition
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Definition
| protective sac enclosing the heart composed of two layers with fluid between |
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Definition
| lower right or left chamber of the heart |
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Term
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Definition
| heart valve between the left ventricle and the aorta |
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Term
| mitral valve (bicuspic valve) |
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Definition
| heart valve between the left atrium and the left ventricle |
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Term
| pulmonary semilunar valve |
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Definition
| heart valve opening from the right ventricle to the pulmonary artery |
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Term
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Definition
| valve between the right atrium and the right ventricle |
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Term
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Definition
| vessels that carry blood from the heart to the arterioles |
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Term
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Definition
| large artery that is the main trunk of the arterial system branching from the left ventricle |
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Term
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Definition
| small vessels that receive blood from the arteries |
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Term
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Definition
| tiny vessels that join arterioles and venules |
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Term
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Definition
| small vessels that gather blood from the capillaries into the veins |
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Term
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Definition
| vessels that carry blood to the heart from the venules |
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Term
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Definition
| circulation of blood throughout the body via arteries, arterioles, capillaries, venules, and veins to deliver oxygen and nutrients to body tissues |
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Term
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Definition
| circulation of blood through the coronary blood vessels to deliver oxygen and nutrients to the heart muscle tissue |
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Term
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Definition
| circulation of blood from the pulmonary artery through the vessels in the lungs and back to the heart via the pulmonary vein, providing for the exchange of gases |
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Term
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Definition
| to expand; period during the cardiac cycle when blood enters the relaxed ventricles from the atria |
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Term
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Definition
| to contract; period during the cardiac cycle when the heart is in contraction and blood is ejected through the aorta and the pulmonary artery |
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Term
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Definition
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Definition
| – the pacemaker; highly specialized, neurological tissue impeded in the wall of the right atrium; responsible for initiating electrical conduction of the heartbeat, causing the atria to contract and firing conduction of impulses to the AV node |
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Term
| atrioventricular (AV) node |
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Definition
| neurological tissue in the center of the heart that receives and amplifies the conduction of impulses from the SA node to the bundle of His |
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Term
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Definition
| neurological fibers extending from the AV node to the right and left bundle branches that fire the impulse from the AV node to the Purkinje fibers |
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Term
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Definition
| fibers in the ventricles that transmit impulses to the right and left ventricles, causing them to contract |
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Term
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Definition
| resting; resting state of a myocardial cell. |
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Term
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Definition
| change of a myocardial cell from a polarized (resting) state to a state of contraction (De – not // polarization – resting) |
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Term
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Definition
| recharging of the myocardial cell from a contracted state back to a resting state (re=again// polarization=resting) |
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Term
| normal sinus rhythm (NSR) |
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Definition
| regular rhythm of the heart cycle stimulated by the SA node (average rate of 60-100 beats/min) |
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Term
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Definition
| thickening, loss of elasticity, and calcification (hardening) of arterial walls |
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Term
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Definition
| a form of arteriosclerosis characterized by the buildup of fatty substances that harden within the walls of arteries; more specific because of plaque build-up. |
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Term
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Definition
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Term
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Definition
| a clot (ex: air, fat, or a foreign object) carried in the bloodstream that obstructs the flow of blood when it lodges (embolus = a stopper) |
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Term
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Definition
| condition of narrowing of a part |
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Definition
| compression of a part that causes narrowing (stenosis) |
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Term
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Definition
| plugging; an obstruction or a closing off. |
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Term
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Definition
| to hold back blood; decreased blood flow to tissue caused by constriction or occlusion of a blood vessel |
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Term
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Definition
| to stuff; a localized area of necrosis (condition of tissue death) caused by ischemia resulting from occlusion of a blood vessel |
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Term
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Definition
| chest pain caused by a temporary loss of oxygenated blood to heart muscle; often caused by narrowing of the coronary arteries (angina = to choke) |
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Term
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Definition
| a widening; a bulging of the wall of the heart, aorta, or artery caused by a congenital defect or acquired weakness |
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Definition
| to limp; pain in a limb (especially the calf) while walking that subsides after rest; caused by inadequate blood supply |
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Definition
| profuse sweating (perspiration) |
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Term
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Definition
| subjective experience of pounding, skipping, or racing heartbeats |
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Term
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Definition
| to grow; an abnormal growth of tissue around a valve, generally as a result of infection |
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