The gastrointestinal (GI) system begins with the mouth and ends with the anus. It is approximately 25 feet in length in the adult. The primary functions of the GI system are food digestion, extraction of nutrients, and waste elimination. Parts of the GI tract include
• Small and large intestine
• Salivary glands
Please see Figure 9.1 for organs of the gastrointestinal system.
Problems in the GI system can result in impaired function of the organs involved. Lack of nutrient ...