Heart #2
Help!
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| atria (singular is atrium) | sm, thin walled, seperior chambers that recieves blood
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| atria have ___ on top: | auricles; -ear shaped appendages that increase volumn
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| atria anterior (front) walls are: | rough (called pectinate-combed)
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| fossa ovalis located on: | inter atrial septum ,(prior loc of foramen ovale in fetal heart
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| blood enters RIGHT ATRIUM from: | superior vena cava, inferior vena cava & coronary sinus
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| superior vena cava | returns blood from regions above diaphragm
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| inferior vena cava | returns blood from areas below the diaphragm
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| coronary sinus | collects blood draining from the mycocardium
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| Blood enters LEFT ATRIUM from: | 4 pulmonary veins, which transport the blood from lungs back to heart
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| ventricles called discharging chambers because: | release blood into body circulation
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| which ventricles dominate? | left
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| which chambers are most mass? | ventricles
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| thick muscular walls of ventricles devided by: | inter ventricular septum
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| septum = | wall
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| chordae tendineae (heart strings) are: | white collegen cords that anchor valve cusps to the papillary muscles
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| trabeculae carneae (crossbars of flesh) | inferior surface of heart internal wall-irregular ridges of muscle
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| papillary muscles are cone like: | uscle projections that extend into the ventrical cavity and assist in valve junction
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| Blood leaves the RIGHT Ventricle thru: | pulmonary artery
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| blood leaves LEFT Ventricle thru: | aorta (largest of the arteries)
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| Path of B thru Heart: R | RA to RV to PA to lungs then back toheart
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| two circuits are: | pulmonary, systemic
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| pulmonary: | right side is pulmonary circuit pump
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| systemic | left side is systemic pump
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| lub dub | closing of H valves
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Created by:
Jean and Study Pals