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26 Cards in this Set
- Front
- Back
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3 features of cardiac muscle that is different in skeletal muscle
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mono/binucleated - intercalated discs - branching fibers
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what initiates contraction of cardiac muscle
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special cardiac autorhythmic cells self-initiate contraction
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what controls the rate of contraction in cardiac muscle
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sympathetic + parasympathetic (vagus nerve) innervation
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where does the coronary sinus take their blood
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right atrium
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where does the inferior & superior vena cava take their blood
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right atrium
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where does the pulmonary veins take their blood
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left atrium
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where does the pulmonary arteries take their blood
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lungs
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where does the aorta take their blood
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body
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where does the coronary artery take their blood
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heart muscle
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which side of the heart is involved in systemic circulation
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left side
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which side of the heart is involved in pulmonary circulation
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right side
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what is the function of the papillary muscle & the chordae tendinae
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papillary muscles contract putting tension on the chordae tendinae to hold valves shut
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within what cavity is the heart located
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mediastinum
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the fossa ovale is a remnant of what fetal structure
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foramen ovale
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what is a patent foramen ovale
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if the foramen stays open after birth
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what is the problem with a patent ovale
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allows deoxygenated blood to mix w/ oxygenated blood in left atrium
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which coronary artery usually gives rise to nodal arteries that supply both the SA & AV nodes
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right coronary artery
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which heart chamber has the thickest myocardium
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left ventricle
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why does the left ventricle have a thick myocardium
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needs more force in contractions to push blood out of the heart to the rest of the body
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to what vessels do all the coronary veins return blood
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coronary sinus
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where does the coronary sinus empty the blood
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right atrium
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the ligamentum arteriosum is a remnant of what structure
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ductus arteriosum
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the ligamentum arteriosum allows ____ bypass prior to birth
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lung
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the ligamentum arteriosum is located between …
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pulmonary trunk + aorta
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name 2 valves that are open as the ventricles contract
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pulmonary semilunar + aorta semilunar valves
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the endocardium is continuous with the walls of vessels as which tunic
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tunica intima (interna)
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