2.03: Digestive System 2 Flashcards
Oropharynx
NKSSE
- elastic fibers in lamina propia
- No muscularis Mucosae
- No submucosa
- Irregularly arranged skeletal muscle
General Layers of GI Tract
Mucosa –> Submucosa –> Musclaris externa –> Adventitia/serosa
what is typically found in the mucosa?
- epithelium lining lumen
- lamina propria
- muscularis mucosae (circular and longitudinal layers of mucsle, single longitudinal layer in esophagus)
What is typically found in the submucosa?
Meissners plexus
What is typically found in the Muscularis Externa
- inner circular muscle layer (contains myenteric/auerbach plexus)
- outer longitudinal muscle layer
Glands found in the lamina Propria of the esophagus
Esophageal cardiac glands
Glands found in the submucosa of the esophagus
esophageal glands proper
Upper portion of the esophagus
- muscularis externa = skeletal muscle
- has adventitia
- esophageal glands proper in SM
- upper esophageal sphincter
Lower portion of the Esophagus
- Muscularis externa - smooth musche
- has serosa
- lower esophageal sphincter/gastroesophageal/cardiac
Gastroesophageal juntion
- esophageal cardiac glands of mucosa secrete mucus
- gastric epithelium is simple columnar
4 main parts of the stomach
cardia, fundus, corpus (body), pylorus
Rugae
found of mucosal surface of the stomach, they are temporary longitudinal folds
3 layers of muscularis externa in stomach (inner to outermost)
oblique, circular, longitudinal
where are stem cells located in stomach cells
the isthmus/upper region
appearance of Cardia glands
the pits and glands are equal in length
appearance of body/fundus
longer glands, more variety of cells
