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Stack #4194722

heart structure and function

TermDefinition
pericardium membrane sac that surrounds the heart. holds the heart in place and prevents it from overstretching and contains a fluid that prevents friction as the heart moves
heart muscle branching fibres with intercalculated discs. ensures rapid nervous impulses through the heart
septum muscular wall, seperates the left and right sides of the heart
atria recieving chambers at the top of the heart. right recieves deoxygenated blood from the body and the left recieves oxygenated blood from the lungs
ventricles thick muscular lower chambers of the heart. right has thin walls as blood only pumps to the lungs. left has thick walls as blood pumps to the whole body
atrioventricular valves valves between the atria and ventricles. prevents backflow of blood. bicuspid is left and tricuspid is right
chordae tendinae and papilary muscules string like structures attached to the flap of the valve. prevent the valve cusps inverting. chords are anchored to the ventricle walls, cardiac muscle, by the papilary muscules
semi-lunar valves found at the base of the two major arteries that carry blood out of the heart. stop blood re-entering the ventricles after the ventricles have contracted and ejected blood out of the heart
vena cava major veins of the body and returns deoxygenated blood to the right atrium
pulmonary artery a major artery that carries deoxygenated blood from the right ventricles to the lungs
pulmonary vein a major vein that carries oxygenated blood from the lungs to the left atrium
aorta a major artery that carries oxygenated blood from the left ventricle to the body
Created by: Anesu8648
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