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The stomach is located between the esophagus and the small intestine. The pyloric sphincter controls the passage of partially digested food (chyme) from the stomach into the duodenum, the first and shortest part of the small intestine, where peristalsis takes over to move this through the rest of the intestines.
The gastric folds (or gastric rugae) are coiled sections of tissue that exist in the mucosal and submucosal layers of the stomach. [ 1 ] They provide elasticity by allowing the stomach to expand when a bolus enters it. These folds stretch outward through the action of mechanoreceptors, which respond to the increase in pressure. [ 2 ]
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body. The process of digestion has three ...
Drawing of the digestive system of Paryphanta busbyi. 1-2 - buccal mass, 1 - mouth, 2 - pharynx, 3 - retractor muscles of the pharynx, 4 - salivary glands, 5 - salivary ducts, 6 - oesophagus, 7 - stomach. Drawing of the digestive system of carnivorous Schizoglossa novoseelandica, showing the large pharynx. 1-2 - buccal mass, 1 - mouth, 2 - pharynx,
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English: The gastrointestinal tract, also called the digestive tract, alimentary canal, or gut, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste. Español: El esquema de nuestro Aparato Digestivo.
Gastrointestinal wall. The gastrointestinal wall of the gastrointestinal tract is made up of four layers of specialised tissue. From the inner cavity of the gut (the lumen) outwards, these are the mucosa, the submucosa, the muscular layer and the serosa or adventitia. The mucosa is the innermost layer of the gastrointestinal tract.
Abdomen. The abdomen (colloquially called the belly, tummy, midriff, tucky, or stomach[citation needed]) is the front part of the torso between the thorax (chest) and pelvis in humans and in other vertebrates. The area occupied by the abdomen is called the abdominal cavity. In arthropods, it is the posterior tagma of the body; it follows the ...