PHGY 214 Lecture Notes - Lecture 34: Vasoconstriction, Blood Pressure, Stim
9 Dec 2017
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Document Summary
Provide accessory route by which fluid can be returned from interstitial space to blood. Inside pressure forces overlap edges together so lymph cannot escape. Diff in density of lymp depending on organ sys, importance of addition drainage. Lymph: interstitial fluid that enters a lymph vessel. Eventually empty into venous sys near where blood enters ra. One way valves spaced at intervals direct flow of lymph twrd venous outlet in chest. Defense against disease: lymph nodes have phagocytes which destroy bacteria filtered from interstitial fluid, dn want infected circ. Return of filtered protein: excess hydrostatic pressure makes gap in endothelial so protein can enter. Inadequate drainage of lymph: damage to venous or lymph sys, hydrostatic pressure rises (due to capillary hydrostatic pressure, over profused driving it into interstitial circ: filtration far greater than absorption. Increase in hydrostatic pressure: decrease in plasma protein conc.
