NSE 13A/B Chapter Notes - Chapter 20: Superior Vena Cava, Pulmonary Valve, External Jugular Vein
8 May 2015
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Document Summary
Cardiovascular system incl. heart and blood vessels. Blood vessels arranged in 2 continuous loops: pulmonary circulation and systemic circulation. When heart contracts, blood is pumped simultaneously into both loops position and surface landmarks. Precordium area on anterior chest overlying heart and great vessels. Great vessels major arteries and veins connected to heart. Heart and great vessels located between lungs in area called mediastinum. Great vessels lie above base of heart. Superior and inferior venae cavae return unoxygenated venous blood to right side. Pulmonary artery leaves right ventricle, bifurcates, carries venous blood to lungs. Pulmonary veins return oxygenated blood to left side of heart. Aorta carries it out to body heart wall, chambers, and valves. Ii. myocardium muscular wall of heart; does the pumping. Iii. endocardium thin layer of endothelial tissue lining inner surface of heart chambers and valves. Two sides of heart separated by impermeable wall, the septum. Atrium thin-walled reservoir for holding blood.
