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10 Cards in this Set
- Front
- Back
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systems within cardiovascular system |
pulmonary circulation (b/w heart and lungs) systemic circulation (b/w body and heart) portal system (b/w GI tract and liver) |
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fibrous skeleton of heart |
4 rings of dense irregular connective tissue for valve leaflet attachement part of membranous portion of interatrial/interventricular septum as electrical insulator |
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SA node |
pacemaker of heart specialized nodal cardiac cells with 60-100 bpm depolarization |
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AV node |
carries impulse across fibrous skeleton to ventricles via bundle of HIS cardiac nodal cells |
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cardiac nodal muscle cells |
Modified cardia muscle fibers which are smaller have fewer myofibrils and lack typical intercalated discs |
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Purkinje fibers |
subendothelial cells that are larger than vent muscle cells glycogens center with myofibrils surrounding round large nuclei autonomic nerves |
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AV node and purkinje |
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purkinje fibers large nuclei |
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what is the hearts impulse conducting system |
SA node to AV node down the Purkinje fibers |
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purpose of electrocardiogram |
monitors spread of electrical impulses through the myocardium heart rate, rhythm, conduction time, ischemic damage location and changes in these parameters |
