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Fluid & Electrolytes - Fluid Electrolyte and...

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Fluid, Electrolyte, and Acid-Base Balance
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Body Water Content Infants have low body fat, low bone mass, and are 73% or more water
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Body Water Content Total water content declines throughout life
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Body Water Content Healthy males are about 60% water; healthy females are around 50%
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Body Water Content This difference reflects females’: Higher body fat
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Body Water Content This difference reflects females’: This difference reflects females’: Smaller amount of skeletal muscle Smaller amount of skeletal muscle
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Body Water Content In old age, only about 45% of body weight is water
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Fluid Compartments Water occupies two main fluid compartments Intracellular fluid (ICF) – about two thirds by volume, contained in cells
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Fluid Compartments Water occupies two main fluid compartments Extracellular fluid (ECF) – consists of two major subdivisions Plasma – the fluid portion of the blood
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Fluid Compartments Water occupies two main fluid compartments Extracellular fluid (ECF) – consists of two major subdivisions Interstitial fluid (IF) – fluid in spaces between cells
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Fluid Compartments Other ECF – lymph
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Fluid Compartments Other ECF –cerebrospinal fluid
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Fluid Compartments Other ECF – eye humors
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Fluid Compartments Other ECF –synovial fluid
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Fluid Compartments Other ECF – serous fluid
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Fluid Compartments Other ECF – gastrointestinal secretions
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Fluid Compartments Figure 26.1
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Composition of Body Fluids Water is the universal solvent
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Composition of Body Fluids Solutes are broadly classified into: Electrolytes – inorganic salts, all acids and bases, and some proteins
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