PMO2 - Gastrointestinal system Flashcards
1
Q
Mucosa - structure
A
3 sub-layers:
1. Mainly columnar epithelium (absorptive & secretory)
2. Lamina propria (small vessels, nerve fibres, immune cells)
3. Muscularis mucosae – thin layer of muscle
2
Q
Submucosa
A
2nd of loose connective tissue
- Blood vessels & lymphatics
- Neural tissue – submucosal plexus = Meissner’s plexus
- Mucous glands
- Lymphatic nodules
3
Q
Muscularis externa
A
4
Q
Adventitia / serosa
A
layer of connective tissue
(serosa = thin layer of connective tissue and epithelium) - in the peritoneum
5
Q
what are the 4 basic layers of the digestive tube?
A
mucosa
submucosa
Muscularis externa
serosa / adventitia
6
Q
A
stratified is used to protect the underneath
7
Q
what type of tissue is epithelial?
A
stratified squamous
8
Q
A
