Anatomy and Cell Biology 2221 Lecture Notes - Lecture 7: Anterior Interventricular Branch Of Left Coronary Artery, Posterior Interventricular Artery, Superior Vena Cava
9 Dec 2016
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Apex between ribs 5 and 6 at midclavicular line. Four corners defined by points projected onto anterior thoracic wall. Keeps heart from overfilling with blood: serous. Atria (2: upper chambers, receive blood via veins. Ventricles (2: lower chambers, pump blood to body via arteries. Right side of heart: receives oxygen poor blood from body, pumps blood through pulmonary circuit. Left side of heart: receives oxygen rich blood from lungs, pumps blood through systemic circuit. Right atrium receives deoxygenated blood superior vena cava, coronary sinus, inferior vena cava. Right ventricle receives deoxygenated blood from right atrium, pumps blood into pulmonary trunk. Left atrium receives oxygenated blood from pulmonary veins (4), discharges blood into left ventricle through bicuspid valve, larger smooth walled part, smaller muscular auricle containing pectinate muscles. Left ventricle receives oxygenated blood from left atrium, pumps blood into ascending aorta. Left ventricle is larger because blood is being pumped over greater distances and pressures (to body)
