RIU 332 Lecture Notes - Lecture 25: Circulatory System, Coronary Circulation, Chordae Tendineae
13 Mar 2020
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Document Summary
Plane: flat surface along which body or structure is cut for anatomical study. Coronary arteries branch off the aorta to supply the heart. Blood returns from the heart tissues to the right atrium through the coronary sinus and cardiac veins. From the right atrium into the right ventricle and then to the lungs. Returns from the lungs to the left atrium, enters the left ventricle, and is pumped back to the body. Atrioventricular valves lie between the atria and the ventricle. Av valves prevent backflow into the atria when the ventricles contract. Chordae tendineae: anchor av valves to papillary muscles. Tricuspid: separates the right atrium and ventricle. Bicuspid separates the left atrium and ventricle. Semilunar valves prevent backflow of blood into the ventricles. Aortic semilunar valve: lies between the left ventricle and aorta. Pulmonary semilunar valve: between right ventricle and pulmonary trunk. Papillary muscles and trabeculae carneae muscles mark ventricular walls. Arteries carrying blood away from the heart.
