Physiology 2130 Lecture Notes - Lecture 2: Body Water, Fluid Compartments, Extracellular Fluid
20 Sep 2016
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Make simply diagram of 2 cells and nearby capillary, labeling. Indicate relative size of each compartment in terms of % of total body water. Explain what accounts for differences in chemical composition of intracellular/interstitial fluids and plasma. Volume of fluid/concentration of ions is controlled so organ systems can function properly. Intracellular fluid compartment (icf): compartment of fluid inside all cells. Extracellular fluid compartment (ecf): compartment of fluid outside the cells. Extracellular fluid: makes up internal environment of body divided into. Interstitial fluid compartment: fluid directly outside the cells. Total body water (tbw): 42 l across all compartments. Plasma: a pale yellow fluid consisting of 92% water, 8% other substances like protein, ions, nutrients, gases and waste. Colloidal solution: liquid containing suspended substances that don"t settle out of solution. Take note of relative ion distribution between areas of the cell, inside/outside. Notice small difference in ion concentration between plasma and interstitial fluid.
