Histology of the Esophagus and Stomach

Question 1

What are the four layers throughout the GI tract?

Answer 1

1. ) Mucosa
2. ) Submucosa
3. ) Muscularis externa
4. ) Serosa

Question 2

Three main functions of mucosa?

Answer 2

Protection
Absorption
Secretion

Question 3

What is found in the submucosa?

Answer 3

Blood
Lymph
Nerves
Glands (occasionally)

Question 4

What are the two layers of smooth muscle in GI tract from inner to outer layer?

Answer 4

Inner: spiral layer
Outer: Longitudinal layer

Question 5

What type of cells are the serous membrane consisting of?

Answer 5

Simple squamous epithelium

Question 6

What are the layers of the esophagus from inner to outer?

Answer 6

Mucosa
Submucosa
Muscularis externa
Adventitia

Question 7

Four major components of gastric juice:

Answer 7

HCl
Pepsinogen (chief cells)
Mucous
Intrinsic factor (parietal cells)

Question 8

What is the band that runs down the large intestine?

Answer 8

Teniae coli

Question 9

What are the individual pockets of the colon?

Answer 9

Haustra coli

Question 10

What are the folds that create the pockets in the colon?

Answer 10

Transverse rectal fold

Question 11

Three areas mucosa-associated lymphatic tissue is found:

Answer 11

Digestive
Respiratory
Genitourinary tracks