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Lecture 27

BIOL 240 Lecture 27: APRIL 9

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BIOL 240

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APRIL 9 , 2018 Myocardium= muscle of the heart Myocardium has own supply of arteries and veins supplying them with nutrients and removing waste Chambers of the heart divided by septae: - Two atria divided by interatrial septum o Right atrium o Left atrium - Two ventricles divided into interventricular septum o Left ventricle o Right ventricle Right atrium - Receives oxygen poor blood from systemic circuit through these vessels: o Superior vena cava o Inferior vena cava o Coronary sinus Deoxygenated blood from heart itself - Pectinate muscles o Folds formed by the hearts - Fossa ovalis o Separated right atrium form left Right Ventricle - Receives blood from the right atrium and pumps it into the pulmonary circuit via the pulmonary trunk - Internal walls of the right ventricle o Trabeculae carneae o Papillary muscle Folds from myocardium o Chordae tendineae Tendons of the heart Left Atrium - Makes up hearts posterior surface - Receives oxygen rich blood from lungs through pulmonary vein
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