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24 Digestive System

Chpt 24

function of esophagus secrets ucus and transports food
does the esophagus digest no
esphogeal hiatus end of esphogus where it connects to stomach
esophogeal mucosa nonkeratinized stratified squamos, epithelium, lamina propria, muscularis muscosae
type of tissue is lamina propria aerolar connective tissue
type of tissue is muscularis muscosae smooth muscle
esophogeal submusosa aerolar connective tissue, blood vessels, mucous glands
esopheal muscularis 1st 3rd is skeletal muscle, then skeletal and smooth muscle, then smooth muscle
LES or lower esophageal sphincter regulates movement of food from esophagus to stomach
GERD LES fails to close properly, HCL burns esophageal walls which is called heartburn, avoid foods that increase stomach acid
pyloric sphincter seperates stomach and duodenum, prevents chyme from returning to stoach
pylorospasm sphincter is too tight food does pass through pyloric sphincter, stomach overfills causing vomit
pyloricstenosis narrowing of sphincter that causes projectile vomit
parts of the sm intestines pyloric sphincter, duodenum, jejunum, ileum, ileocecal sphincter
parts of the lg intestines ileocecal sphincter, cecum, colon which consists of ascending colon, transverse colon, descending colon and sigmoid colon, rectum, anal canal
why is the stomach larger than gi tract fundus stores food and the stomach needs room to churn food, GI tract is mainly responsible for transporting food
salivary amaylase breaks down starch in mouth
sequence of GI mouth, teeth,tongue, parotid, submadibular and sublingual salivary glands, pharynx, UES, esophagus, LES, stomach, pyloric sphincter, duodenum, jejunum, ileum, ileocecal sphincter, cecum, ascending, transverse, descending, sigmoid, rectum, anal canal, anus
what is attached to the cecum appendix
4 common layers of GI mucosa, submucosa, muscularis, serosa
most inner layer of GI mucosa
stomach epithelium mucosa, submucosa, muscularis, serosa
colon epithelium mucosa prevents microbes and pathogens, submocosa, muscularis, taniae coli
areaolar connective tissues contains several cells and connects to skin
nonkeratinized stratified squamous no keratin, moist, 1st line of defense from microbes
lamina propria supports epithelium and holds blood vessels in place
digestive enzymes of saliva salivary amylase and lingual lipase
gastric juice pepsin, gastric lipase
pancreatic juice pancreatic amylase, trypsin, chymotrypsin, elastase, carboxypeptidase, pancreatic lipase, nucleases are ribonuclease and deoxyribonuclease
brush border xdextrinase, maltase, sucrase, lactase, enterokinase, peptidases, amionpeptidase, dipeptidase, nucleosidase and phosphates
Created by: kayjay



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