Textbook Notes (367,930)
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Biology (600)
BIO220H1 (56)
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Chapter 14

Chapter 14 - chapter notes.

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Chapter 14: The Cardiovascular System: Blood Vessels, Blood Flow, and Blood Pressure Physical Laws Governing Blood Flow and Pressure RULE : Flow = PR P = size of pressure gradient force that pushes the flow of liquid thru pipe R = resistance hinder the flow of liquid thru pipe How pressure gradients and resistance affect blood flow in individual vessels and network of vessels. Pressure Gradients in the CVS Pressure gradient drives the flow from region of higher pressure to lower pressure, down the pressure gradient. Like a balloon. By Bulk Flow. The Role of Pressure Gradients in Driving Blood Flow By pumping blood into the arteries heart raises arterial pressure (Figure 14.1) rel.bet. pressure and flow in blood vessels. Hydrostatic column vertical distance from the vessel to surface of liq. That determines the pressure at either end of the vessel. Hydrostatic column pressure. The deeper you go the more pressure the h2o exerts on your body. If difference between levels are constant as in Fig. 14c = Flow = 0 no change. Pressure Gradients Across the Systemic Circuit In sys.circui MAP Mean Arterial Pressure = 85mm Hg CVP - Central Venous Pressure pressure in the large veins in the thoracic cavity that lead to the heart = 2-8 mm Hg Vena Cava = 0 mm Hg The difference bet. The MAP and the CVP is the pressure gradient that drives blood flow. www.notesolution.com
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