3 4 The Digestive System Medicine Libretexts

3 4 The Digestive System Medicine Libretexts The digestive system is one of the eleven organ systems of the human body, and it is composed of several hollow tube shaped organs including the mouth, pharynx, esophagus, stomach, small intestine, large intestine (colon), rectum, and anus. it is lined with mucosal tissue that secretes digestive juices (which aid in the breakdown of food) and. By moving food back and forth in the intestinal tract, segmentation mixes food with digestive juices and facilitates absorption. figure 3.4.3 3.4. 3: segmentation separates chyme and then pushes it back together, mixing it and providing time for digestion and absorption.

22 1a Anatomy Of The Digestive System Medicine Libretexts Digestive processes. the processes of digestion include seven activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, secretion, absorption, and defecation. the first of these processes, ingestion, refers to the entry of food into the alimentary canal through the oral cavity. Digestion. digestion of food is a form of catabolism, in which the food is broken down into small molecules that the body can absorb and use for energy, growth, and repair. digestion occurs when food is moved through the digestive system. it begins in the mouth and ends in the small intestine. the final products of digestion are absorbed from. Figure 18.2.2 18.2. 2: the components of the digestive system include the gastrointestinal tract and accessory organs of digestion. the image has labeled parts of the mouth, salivary glands, liver, gallbladder and associated ducts, stomach, pancreas, and small and large intestine parts. find the organs of the digestive system in this diagram as. The mouth is the first digestive organ that food enters. the sight, smell, or taste of food stimulates the release of digestive enzymes by salivary glands inside the mouth. the major salivary enzyme is amylase. it begins the chemical digestion of carbohydrates by breaking down starch into sugar. the mouth also begins the process of mechanical.