-
Digestive System
- Digestive tract
- Accessory organs
-
Digestive tract
muscular tube
-
Accessory organs
Salivary glands,gallbladder,liver, and pancreas
-
Digestive functions
- Ingestion
- Mechanical processing
- digestion
- secretion
- absorption
- excretion
-
Digestive tract layers
- mucosa
- submucosa
- muscularis externa
- serosa
-
Mucosa
- Mucous membrane
- lamina propria _loose connective tissue layer
- Villi in small intestine
- Oral cavity, pharynx, esophagus, and anus have stratified squamous epithelium
- remander has simple squamous with secretory cells
- contractions of the muscularious move the mucosal folds and vili
-
submucosa
- second layer of loose connective tissue
- large blood vessels
- sensory neurons
- parasympathtic motor neurons
- submucosal plexus involved controlling and coordination contractions of smooth muscle layers
-
Muscularis externa
- band of smooth muscles in circular layer and an londituadal layer
- contractions both agrigate materials and propel them
- controlled bythe myenteric plexus
- parasympathetic
-
Serosa
- serious membrane
- covers the muscularis externa along the mst portions of the digestive tract withing the peritoneal cavity
-
The visceral peritoneum is continous with
the parietal peritoneum
-
portions of the digestive tract at suspended by
mesenteries,double sheets of serous membrane composted of the parietal and viseral peritoneum
-
Adventitia
fibrous wrapping of adjacent structures
-
peristalstis
muscularis externa propels materials from one part to the next
-
Panceratic islets secrete
insulin and glucogon
|
|