FUNCTIONS
In addition to providing energy,
fats are essential for the functioning and structure of body tissues (Table
5-1). Fats are a necessary part of cell membranes (cell walls). They contain
essential fatty acids and act as carriers for fat-soluble vitamins A, D, E, and
K. The fat stored in body tissues provides energy when one cannot eat, as may
occur during some illness and after abdominal surgery. Adipose (fatty) tissue
protects organs and bones from injury by serving as protective padding and
support. Body fat also serves as insulation from cold. In addition, fats
provide a feeling of satiety (satisfaction) after meals. This is due partly to
the flavor fats give other foods and partly to their slow rate of digestion,
which delays hunger.
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