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Tissue Fluid Workshop

OCR Biology/AQA Human Biology - VERY BASIC

Tre Briercliffe

on 21 May 2013

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Transcript of Tissue Fluid Workshop

Tissue Fluid: Arteriole High Pressure Oxygenated blood from heart Body Cell Surrounded by Tissue Fluid Venule deoxygenated blood back for oxygenation gaps in capillary walls
Allow smaller substances and fluid through direction of blood flow High hydrostatic pressure causes some components of the blood to be squeezed out of the gaps in the capillary walls too large proteins and blood cells stay in the blood tissue fluid contains - water from blood plasma, dissolved oxygen, mineral ions and glucose Glucose and Oxygen taken up by the cells used in respiration waste products like carbon dioxide released Proteins and Blood cells in the capillary means a lower water potential than the tissue fluid - small movement of fluid into capillaries down water potential gradient direction of blood flow Hydrostatic Pressure decreases along capillary - fluid lost through gaps in capillary walls water potential remains the same direction of blood flow hydrostatic pressure has decreased water potential now having the biggest impact - net movement of fluid into the capillary + waste Lymph vessel Fluid not returned to blood vessel will drain away in lymph vessel - becomes lymph
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