Human digestive system | Description, Parts, & Functions | Britannica
2024年10月25日 · Glands contributing digestive juices include the salivary glands, the gastric glands in the stomach lining, the pancreas, and the liver and its adjuncts—the gallbladder and bile ducts. All of these organs and glands contribute to the physical and chemical breaking down of ingested food and to the eventual elimination of nondigestible wastes.
Gastric gland | Mucous Cells, Parietal Cells & Chief Cells - Britannica
gastric gland, any of the branched tubules in the inner lining of the stomach that secrete gastric juice and protective mucus. There are three types of gastric glands, distinguished from one another by location and type of secretion.
Human digestive system - Secretions, Enzymes, Absorption
2024年10月25日 · One of the major sources of digestive secretion is the pancreas, a large gland that produces both digestive enzymes and hormones. The pancreas empties its secretions into the duodenum through the major pancreatic duct (duct of Wirsung) in the duodenal papilla (papilla of Vater) and the accessory pancreatic duct a few centimetres away from it.
Lieberkühn’s glands | anatomy | Britannica - Encyclopedia Britannica
Lieberkühn glands, occupying the mucous membrane, secrete digestive enzymes, provide outlet ports for Brunner glands, and produce cells that replace surface-membrane cells shed from the tips of villi.
Small intestine | Digestive Function, Structure & Length | Britannica
3 天之前 · Small intestine, a long, narrow, folded or coiled tube extending from the stomach to the large intestine; it is the region where most digestion and absorption of food takes place. It is about 6.7 to 7.6 metres (22 to 25 feet) long, highly convoluted, and …
Gastrointestinal tract | Definition, Organs, Diagram, & Facts
2024年9月15日 · Gastrointestinal tract, pathway by which food enters the body and solid wastes are expelled. The gastrointestinal tract includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus.
Human digestive system - Gastric Mucosa, Digestive Processes, …
2024年10月25日 · Mucoid cells are the main cell type found in the gastric glands in the cardiac and pyloric areas of the stomach. The necks of the glands in the body and fundic parts of the stomach are lined with mucoid cells.
Human digestive system - Gastric Secretion, Digestive Process, …
2024年10月25日 · Human digestive system - Gastric Secretion, Digestive Process, Nutrient Absorption: The gastric mucosa secretes 1.2 to 1.5 litres of gastric juice per day. Gastric juice renders food particles soluble, initiates digestion (particularly of proteins), and converts the gastric contents to a semiliquid mass called chyme, thus preparing it for ...
Human digestive system - Salivary Glands, Enzymes, Digestion
2024年10月25日 · Besides the many minute glands that secrete saliva, there are three major pairs of salivary glands: the parotid, the submandibular, and the sublingual glands. The parotid glands, the largest of the pairs, are located at the side of the face, below and in front of each ear.
Stomach | Definition, Function, Structure, Diagram, & Facts
2024年10月29日 · The stomach serves as a temporary receptacle for storage and mechanical distribution of food before it is passed into the intestine. In animals whose stomachs contain digestive glands, some of the chemical processes of digestion also occur in the stomach.