PHPY 302 Lecture 1: CV System Notes 09.27.16
17 Oct 2016
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Document Summary
Elements of the cv system (pg 410) Origins of pressure in circulation (pg 418-419) Measurement of bp, bf, co (pg 420-428) Single cells and small organisms meet their metabolic needs by diffusion and convection (external to internal environment). For large organisms, diffusion is inadequate to supply nutrients & eliminate waste long distance, therefore it requires circulation. The cardiovascular system is an evolutionary consequence of the increasing size and complexity of multi-cellular organisms. Cv system is closed; blood never leaves the network of vessels. Oxygen and nutrients diffuse across the blood vessel layers and enter the interstitial fluid which carries o2 and nutrients to the target cell. Co2 and wastes are taken in the opposite direction. Supplies the body oxygen through the resp system and nutrients (glucose, aas, etc) through the digestive system. Removes waste such as carbon dioxide from the resp system through the lungs and salts and urea through the renal system (kidneys)
