BIOL 1221 Lecture Notes - Lecture 4: Inferior Vena Cava, Superior Vena Cava, Left Coronary Artery
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22 Jun 2017
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The myocardium is too thick to allow diffusion and allow nutrients in, the heart receives its nutrients through the coronary circulation. Left coronary artery: left side of heart, supplies left atrium and ventricle. Right coronary artery: right side of the heart, supplies right atrium and ventricle. Complete blockage leads to a heart attack. Cardiac veins: after the blood passing through the capillary beds, the venous blood is collected in the cardiac veins. Coronary sinus: the cardiac veins join together to form the coronary sinus that empties the blood in the right atrium. Labelled diagram showing the flow of blood through the heart. Deoxygenated blood returns to the body tissues to the heart and enters the superior vena cava (svc), inferior vena cava (ivc), Coronary sinus to right atrium through the tricuspid valve into the right ventricle, when ventricles contract intraventricular pressure rises and blood pushes up the pulmonary semilunar valves and cause them to open .
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