Physiology 2130 Lecture 2: Module 2 and 3- body fluids and cells
10 Oct 2015
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Document Summary
Body is divided into 2 major fluid compartments: intracellular fluid compartment and extracellular fluid compartment (icf and ecf) Ecf makes up the internal environment and can be subdivided into: interstitial fluid (compartment right outside bathing of cells) and plasma (watery portion of blood) For average 154lb person the total body water content is 42l: icf is 28l, interstitial compartment is 11l, and plasma is 3l. Plasma: 92% water, 8% other (proteins, ions, nutrients, gases and waste products) Plasma is colloidal (a liquid containing suspended substances) in this case mostly plasma proteins such as albumins, globulins and fibrinogen, its volume remains relatively constant. Water intake through the digestive tract generally matches the water loss from the kidneys, lungs, digestive tract and skin. Chemical composition of the body fluids includes: potassium ions, sodium ions, calcium ions, chloride ions, and protein ions. Caused by the cell membrane and its selective permeable properties.
