Anatomy and Physiology of the Gastrointestinal Tract Simplified

The gastrointestinal (GI) system comprises the GI tract and accessory organs. The GI tract consists of the oral cavity, pharynx, esophagus, stomach, small intestine, large intestine, and anal canal.
The accessory organs include the teeth, tongue, and glandular organs such as salivary glands, liver, gallbladder, and pancreas.
The main functions of the GI system include ingestion and digestion of food, nutrient absorption, secretion of water and enzymes, and excretion of waste products.
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