EPHE 141 Lecture Notes - Lecture 6: Medulla Oblongata, Stratified Squamous Epithelium, Escalator

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Serous fluid is critical to prevent friction between pericardium and myocardium. If there is dysfunction in endothelium, it affects the blood vessels and heart. Intercalated discs which contain gap junctions for the spread of an action potential. Essential for enhancing speed of transmission of impulse throughout myocardium. Right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve, pulmonary trunk, pulmonary arteries, lobar branch of the pulmonary arteries, pulmonary arterioles, capillary bed, pulmonary veins, left atrium, bicuspid valve, left ventricle, aortic semilunar valve, aorta. Left ventricle because right ventricle only pumps to the lungs while the left ventricle pumps blood to the entire body, so requires more pressure to push the blood. Right atrioventricular valve is tricuspid whereas left atrioventricular valve (mitrial valve) is bicuspid. Oxygenated blood returns to the heart via the: right atrium, atrioventricular sinus, left atrium, left ventricle, right ventricle. Which valves are more elastic and more firmer? semilunar valves. They help control the movement of av valve flaps.

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