Body Fluid Compartments In lean adults, body fluids constitute 55% of female and 60% of male total body mass Intracellular fluid (ICF) : About 2/3 of body fluid Extracellular fluid (ECF) : 1/3 of body fluid which include Interstitial fluid & Plasma Interstitial fluid between cell is 80% of ECF Plasma in blood is 20% of ECF Also includes lymph, cerebrospinal fluid, synovial fluid, aqueous humor, vitreous body, endolymph,, pleural, pericardial, and peritoneal fluids Sources of Body Water Gain and Loss * Fluid balance related to electrolyte balance * Kidneys excrete excess water through dilute urine or excess electrolytes through concentrated urine Body can gain water by Ingestion of liquids and moist foods (2300mL/day) Metabolic synthesis of water during cellular respiration (200mL/day) Body loses water through Kidneys (1500mL/day) Evaporation from skin (600mL/day) Exhalation from lungs (300mL/day) Feces (100mL/day) Body Fluid Compartments Daily Water Ga...
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