Physiology 2130 Study Guide - Extracellular Fluid, Fluid Compartments, Horse Length

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Because of homeostasis, the volume of fluids and concentration of ions is closely controlled so our organ systems function properly. Two major fluid compartments : intracellular fluid compartment (icf inside all cells) and the extracellular fluid compartment (ecf everything outside of cells) Ecf makes up the internal environment of the body divided into the interstitial fluid compartment (fluid directly outside, bathing the cells) and the plasma (watery portion of the blood) For a 70 kg person 42 l of blood (11. 1 gallons); icf contains 28 l (7. 4 gallons; 67% of. Tbw) and the intersistial compartment contains 11 l (2. 9 gallons, 6. 4% of tbw) and plasma contains 3 l (0. 8 gallons, 6. 6% tbw) Huge difference in ion concentrations between inside/outside of cell; small diferrence between the plasma and interstitial fluid: ex.

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