3.3 Anatomy of the Stomach, Intestines, and Accessory Organs Part 2 Flashcards
What is the unique third layer in the stomach?
oblique layer
What is the oblique layer?
extra muscular layer that allows the stomach to mix food more efficiently with the gastric juices
What happens if gastric juice happens to penetrate the mucus layer of the stomach?
pepsin starts to digest the stomach lining causing an ulcer
What protects the stomach and duodenum from the gastric juices?
mucus layer
What is an ulcer?
open sore in the stomach wall caused by the gradual disintegration of tissues
What can cause ulcers?
H. pylori
NSAIDs
aspirin
What is chyme?
contents of the stomach
What occurs when chyme enters the duodenum?
reflex activates that causes the muscles of the pyloric sphincter to contract and close the opening temporarily
How long is the small intestine?
20 ft
What are the beginning and ending of the small intestine?
pyloric sphincter
ileocecal valve
What is the longest portion of the GI tract?
small intestine
What are the sections of the small intestine?
duodenum
jejunum
ileum
What is the shortest section of the small intestine?
duodenum
What is important about the duodenum?
location where enzymes from the pancreas and bile from the liver enter the small intestine
Which is longer: jejunum or ileum?
ileum
