intro

Question 1

4 layers of small intestine (inner to outer)

Answer 1

1. mucosa
2. submusosa
3. muscalaris externa
4. serosa

Question 2

mucosa 2 key parts

Answer 2

epi cells and lamina propria

Question 3

submucosa

Answer 3

made up of connective tissue
contains lymphatic vessels and blood vessels

Question 4

muscalaris externa

Answer 4

smooth muscle layer
iner: circular
outer:longitudinal

Question 5

serosa

Answer 5

outer connective tissue layer, functions in protectin

Question 6

colon contains (crypts, villi)

Answer 6

only crypts, no villi

Question 7

villi

Answer 7

projections into lumen covered with mature absorptive epi cells (enterocytes) and occasional mucus secreting goblet cells

Question 8

crypts

Answer 8

where stem cells are found (bottom) divide to form daughter cells, mature into epi cells