Term
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Definition
-pacemaker
-collection of specialized "conducting cells" in right atrium
-initiates heartbeat |
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Term
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Definition
-receives message from SA node and sends to bundle of His
-located in right atrium |
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Term
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Definition
-collection of nerve fibers (tract) located in interventricular septum
-transmits message to Purkinje fibers |
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Term
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Definition
-located in walls of ventricles
-conduct impulse to myocardium
-results in ventricular contraction |
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Term
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Definition
-releases norepinephrine
-acts on SA node |
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Term
| parasympathetic stimulation |
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Definition
-releases acetylcholine
-inhibitory |
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Term
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Definition
-SA node initiates
-atria contract, force blood into both ventricles |
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Term
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Definition
-ventricles contract
-AV valves close/semilunar valves open
-blood in right ventricle exits through pulmonary arties
-blood in left ventricle exits through aorta
-blood is under highest pressure |
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Term
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Definition
-ventricles relax
-semilunar valves close/AV valves open
-blood fills atria waiting for signal from SA node |
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Term
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Definition
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Term
| amount of blood pumped every minute |
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Definition
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Term
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Definition
| act of listening to sounds of body |
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Term
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Definition
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Term
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Definition
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Term
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Definition
-aorta
-pulmonic
-tricuspid
-bicuspid |
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Term
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Definition
-aortic semilunar valve
-second intercostal space
-right side |
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Term
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Definition
-pulmonic semilunar valve
-second intercostal space
-left side |
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Term
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Definition
- right AV valve
-fifth intercostal space
-right side |
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Term
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Definition
-left AV valve
-fifth intercostal space
-left side (apex of heart) |
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Term
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Definition
| blood is drained from heart tissue through here |
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Term
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Definition
coronary veins enter here
empties into right atrium |
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Term
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Definition
-marginal
-supplies myocardium of lateral side of right heart
-posterior interventricular
-travels in septum to supply posterior ventricles
-right atrium/ventricle |
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Term
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Definition
-circumflex
-supplies left atrium
--anterior interventricular
-supplies interventricular septum and anterior walls of both ventricles |
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