Physiology 2130 Lecture Notes - Lecture 2: Extracellular Fluid, Fibrinogen, Homeostasis

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Internal environment is bathed in fluids: because of homeostasis, the volume fluid and concentration of ions is controlled so our organ systems can function properly of. Body is divided into 2 major fluid compartments: intracellular fluid compartment (icf) inside all the cells, extracellular fluid compartment (ecf) everything outside the cells [makes internal environment of the body] Interstitial fluid compartment = fluid directly outside bathing the cells. For an average person of 70kg, the total body water (tbw) found in all these compartments is 42l: icf = 28 l (67%), interstitial compartment = 11l (26%), plasma = 3l (7%) Plasma = pale yellow fluid that is 92% water, 8% substances (proteins, ions, nutrients, gases, waste products: is a colloidal solution liquid containing suspended substances that do not settle out of solution. Most of the suspended substances are plasma proteins (albumins, globulins, fibrinogen)

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