Chapter 24: Digestive System Flashcards
Peritoneum (cavity)
Peritoneal cavity: between parietal and visceral peritoneum
retroperitoneal organs include
Kidneys, pancreas, duodenum and parts of large intestine
Deglutition (swallowing):
moves food bolus (ball) into esophagus
Esophagus is made of…
Lined by stratified squamous epithelium
Stomach is made of…
simple columnar epithelium
Chief cells secrete…
pepsinogen (converted to pepsin by HCl) and gastric lipase
Parietal cells secrete…
secrete HCl and intrinsic factor (for B12 absorption)
G cells secrete…
gastrin
secretin and cholecystokinin (CCK) decreases…
gastric secretions (s) and gastric motility (cck)
Three phases of control of gastric secretion
Cephalic – secretion of HCl, mucus, pepsinogen, gastrin
Gastric – mixing waves, more gastric juice secreted
Intestinal
Pancreas contain acini which…:
secrete pancreatic juice, containing enzymes (starches, fats, proteins)
Secretion of the pancreatic enzymes is stimulated by…
cholecystokinin (CCK), secretin increases bicarbonate secretion
Liver has dual…
blood supply:
Liver have hepatocytes which secrete…
Hepatocytes secrete bile into bile canaliculi that drain into hepatic ducts.
Gallbladder stores and concentrates…
bile until stimulated to contract by cholecystokinin
