KINS 1224 Chapter Notes - Chapter 25: Gastric Inhibitory Polypeptide, Vasoactive Intestinal Peptide, Gastric Mucosa
30 Mar 2016
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Document Summary
The stomach is a muscular sac connected to the diaphragm. It functions primarily as a food storage organ with an internal volume of about 50ml when empty and 1. 0-1. 5l after a typical meal. Chyme- soupy or pasty mixture of semi-digested food in the stomach. Most digestion occurs after the chyme passes onto the small intestine. Cardiac region (cardia)- is a small area within about 3 cm of the cardiac orifice. Fundic region (fungus)- is the dome superior to the esophageal attachment. Body(corpus) region- is the greatest part distal to the cardiac orifice. Pyloric region- slightly narrow pouch at the inferior end. It is subdivided into a funnel like antrum and a narrower pyloric canal. The latter terminates at the pylorus a narrow passage into the duodenum. Pyloric gastroduodenal sphincter- the pylorus is surrounded by a thick ring of smooth muscle which regulates the passage of chyme into the duodenum. The stomach receives parasympatheic nerve fibers from the vagus nerves.
