Lecture 24 - GI Histology II

Question 1

What are defining characteristics of the duodenum?

L24 S13

Answer 1

• “leaflike” villi
• deep crypts of Lieberkuhn
• Brunner’s glands in submucosa

Question 2

What are defining characteristics of the jejunum?

L24 S21

Answer 2

• long narrow villi
• crypts of Lieberkuhn
• no submucosal glands

Question 3

What are defining characteristics of the ileum?

L24 S26

Answer 3

• narrow villi
• crypts of Lieberkuhn
• no glands in submucosa

Question 4

What cells are present in the crypts of Lieberkuhn?

L24 S19

Answer 4

Paneth cells:

• basal crypt cells
• produces lysozyme

Enteroendocrine cells:

• produce peptide hormones and serotonin
• analogous to goblet cells

Goblet cells

Enterocytes:

• columnar epithelial cells
• absorbs proteins, carbohydrates, and lipids