Lecture 5

Question 1

What are the three parts of the pharynx?

Answer 1

Naso-
Oro-
Largyno-

Question 2

Where is Serosa found?

Answer 2

On structures that are intraperitoneal

Question 3

Where is adventitia found?

Answer 3

on sturctures that are retroperitoneal

Question 4

What are the different types of lining epithelium in the alimentary canal?

Answer 4

Nonkeratinized stratified squamous epithelium and simple columnar epithelium

Question 5

What are the three parts of the Mucosal layer of the alimentary canal

Answer 5

1) lining epithelium
2) Lamina propria
3) muscularis mucosae

Question 6

What are the two types of submucosa?

Answer 6

Dense irregular connective tissue and meissners plexus

Question 7

What are the components of muscularis externa?

Answer 7

1) Smooth muscle (formed by inner circular layers and outer longitudinal layer)
2) myenteric nerve plexus

Question 8

What is another name for serosa? what underlies it?

Answer 8

Mesothelium, rests on top of loose connective tissue

Question 9

T/F adventitia sits on top of loose connective tissue

Answer 9

T

Question 10

What are some important features of the esophagus histologically?

Answer 10

Skeletal muscle, serosa/adventitia, proper esophageal glands, esophageal cardiac glands

Question 11

What are some important features of the stomach histologically?

Answer 11

Simple columnar epithelium, gastric pits, three layers of smooth muscle, chief cells, parietal cells, cardiac/fundic/pyloric glands, mucous neck cells, enteroendocrine cells, and rugae

Question 12

What are the important wall modifications of the small intestine

Answer 12

1) mucosa -

Question 13

What are some of the important histological features of the large intestine?

Answer 13

1) mucosa -
a. simple columnar epithelium
b. crypts of liberkuhn - tubular glands, coloncytes (columnar absorptive cells), goblet cells, enteroendocrine cells, stem cells,
c. lamina propria - lymphoid cells and nodules