Metabolism refers to all of the chemical processes that
take place in the body, such as the burning of sugars (glucose) for energy
and the release of digestive enzymes to break down food. Metabolism results
in growth, the elimination of waste products (in urine and stool), healing
of wounds, and other necessary activities of the body.
Many factors can affect the rate of metabolism, including
exercise, diet, temperature, and hormones.
When problems occur with any of the normal metabolic processes,
changes in the body can occur (such as diabetes or thyroid disease). Changes
in metabolism can affect the entire body.