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Digestive Tract
The digestive system consists of the digestive tract-oral cavity, esophagus, stomach, small and large intestines, and anus-and its associated glands-salivary glands, liver, and pancreas. Also called the gastrointestinal (Gl) tract(GIT) or alimentary canal its function is to obtain from ingested food the molecules necessary for the maintenance, growth, and energy needs of the body. During digestion proteins, complex carbohydrates, nucleic acids, and fats are broken down into their small molecule subunits that are easily absorbed through the small intestine lining. Most water and electrolytes are absorbed in the large intestine.
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