Chapter 13 Dig gestive tract
Chapter 13 Digestive tract
glande Digestive system submandibular Digestive tract Digestive gland pancreas common duct common bile duct ansverse colon cecum
---Digestive system: • Digestive tract • Digestive gland
1. Components of digestive tract oral cavity pharynx esophagus --stomach small intestine large intestine
1. Components of digestive tract ---oral cavity ---pharynx ---esophagus ---stomach ---small intestine ---large intestine
2. General plan of digestive tract Except for oral cavity and pharynx, all other organs share a similar histological plan Submucosa Nerve Gand in submucosa Duct from UCosa Submucosa Muscularis Serosa Mucous Connective epithelium muscle propra ongitudinal Peritoneum
2. General plan of digestive tract ---Except for oral cavity and pharynx, all other organs share a similar histological plan
1)mucosa epithelium stratified squamous epi: protecting simple columnar epi, digestion and absorption -lamina propria: LCT-compact CT: contain more cells and fiber BV, LV-capillaries Lymphoid T glands: structures formed by invagination o epi into lamina propria aris mucosa: a thin layer of SM
1) mucosa ---epithelium: • stratified squamous epi.: protecting • simple columnar epi,: digestion and absorption ---lamina propria: LCT-compact CT: contain more cells and fiber • BV, LV-capillaries • Lymphoid T • glands: structures formed by invagination of epi. into lamina propria ---muscularis mucosa: a thin layer of SM