chyme goes to the small intestine after it leaves the stomach.
chyme goes to the small intestine after it leaves the stomach.
where does chyme go after it leaves the stomach?
small intestine
in the human digestive system, a bolus (a small rounded mass of chewed up food) enters the stomach through the oesophagus via the lower oesophageal sphincter. the stomach releases proteases (protein-digesting enzymes such as pepsin) and hydrochloric acid, which kills or inhibits bacteria and provides the acidic ph of 2 for the proteases to work. food is churned by the stomach through muscular contractions of the wall called peristalsis – reducing the volume of the bolus, before looping around the fundus and the body of stomach as the boluses are converted into chyme (partially digested food). chyme slowly passes through the pyloric sphincter and into the duodenum of the small intestine, where the extraction of nutrients begins. depending on the quantity and contents of the meal, the stomach will digest the food into chyme within anywhere between forty minutes and a few hours . the average human stomach can comfortably hold about a litre of food.
stomach
the acid and semi-digested fats in the duodenum trigger the enterogastric reflex – the duodenum sends inhibitory signals to the stomach by way of the enteric nervous system, and sends signals to the medulla that (1) inhibit the vagal nuclei, thus reducing vagal stimulation of the stomach, and (2) stimulate sympathetic neurons, which send inhibitory signals to the stomach. chyme also stimulates duodenal enteroendocrine cells to release secretin and cholecystokinin. they primarily stimulate the pancreas and gall bladder, but also suppress gastric secretion and motility. the effect of this is that gastrin secretion declines and the pyloric sphincter contracts tightly to limit the admission of more chyme into the duodenum. this gives the duodenum time to work on the chyme it has already received before being loaded with more.
regulation of gastric function