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Cards In This Set
| Front | Back |
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Heart is located in the __________ between second and fifth intercostal space
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Mediastinum
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Heart is anterior to the vertebral __________, and posterior to the _________, and enclosed in the ______
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Column / Sternum / Pericardium
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Right atrium-->_____valve-->right ventricle-->______ valve -->pulmonary trunk --> pulmonary arteries --> lungs
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Tricuspid / Pulmonary Semilunar
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Lungs--> pulmonary veins --> left atrium --> ____ valve --> left ventricle --> ________valve --> aorta --> systemic circulation
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Bicuspid / Aortic Semilunar
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Another term for Tricuspid or Bicuspid Valves
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Atrioventricular Valves
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T/F? Systemic blood volume is higher than pulmonary blood volume.
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False, they are the same
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Which circuit is under higher pressure, Pulmonary or Systemic? Why?
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Systemic, more resistance, longer pathway
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Why is left ventricle bigger than the right?
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More pressure to pump against.
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What is the connective tissue matrix of cardiac muscle that connects each fiber to each other and to the fibrous skeleton
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Endomysium
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Large Mitochondria occupy what percent of cardiac cell volume?
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25-30%
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Junctions between cardiac cells which anchor them made up of desmosomes and gap junctions
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Intercalated discs
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Intercalated discs consist of _______ which function in ________ and ________ junctions which function in ________
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Desmosomes - Anchoring / Gap (junctions) - Signal relaying
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Term that describes the heart's behavior as a single coordinated unit
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Syncytium
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The 1% of the cardiac cells that are self-excitable are considered to have ___________
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Automaticity
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In order for the heart to refill after a contraction, what is important?
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A long absolute refractory period
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