NSG 3315 Lecture Notes - Lecture 23: Hemodynamics, Afterload, Hypervolemia
Document Summary
Chapters 15 - 19: control of cardiovascular function. Systemic circulation - provide oxygenated blood to our cells/organs (arteries = higher pressure) provides oxygen and nutrients to tissues. Pulmonary circulation - return deoxygenated blood to our heart, where it travels to the lungs, to be deoxygenated (venous system = lower pressure for adequate gas exchange) gas exchange occurs in the lungs. Right atrium (superior and inferior vena cave) > tricuspid valve > right ventricle > pulmonary artery (deoxygenated) > lungs for gas exchange > pulmonary vein (oxygenated) > left atrium > mitral valve > left ventricle > aorta. Arterial system - carries oxygenated blood to the tissues. Venous system - returns deoxygenated blood from the tissues to the heart. Capillaries - area of gas and nutrient exchange. Blood moves along a pressure gradient, moving from an area of greater pressure, the arterial side, to an area of lower pressure, venous side.
