Absorption

Absorption, the taking in of fluids or other substances by the skin, mucous membranes, or organs of the body. The absorbed material may be gaseous or fluid. Thus, the skin and mucous membrances, such as those lining the mouth and nose, absorb drugs applied on their surfaces. The digestibe system absorbs solid and liquid foods. The large intestine absorbs fluid and the small intestine takes in carbohydrates, tats, and proteins for further absorption by the blodd and distribution throughout the body.