lecture 21 - stomach and pancreas Flashcards
what is the peritoneum
continuous serous membrane that allows for frictionless movement
what is a mesentery
double layer of visceral peritoneum that connects organ to the body wall
what is the omenta
double layer of visceral peritoneum that connects organ to another organ
what is the eophageal hiatus
where the esophagus passes through the diaphragm
what is the lower esophageal sphincter function
prevents reflux
what is the lesser omentum
double layer of visceral peritoneum, that connects stomach to liver
what is the greater omentum
double layer of visceral peritoneum that connects stomach to transverse colon
what part of the stomach does the esophagus empty into
the cardia
what is the fundus part of the stomach
gas collects here, usually empty unless really full
what are the three layers of the muscularis in the stomach
- inner = oblique
- middle = circular
- outer = longitudinal
what are rugae
temporary folds that allow for expansion of the stomach
what do chief cells produce
enzymes
what do zymogen granules do in chief cells
secretory vesicles containing inactive enzyme
what do parietal cells produce and how
acid
- pumps ions (H+) against its concentration gradient
- requires a lot of mitochondria cause energy dependent
what does the pyloric sphincter do
controls release of chyme into the small intestine
