small intestines

Question 1

describe the Topography of the deuodenum

Answer 1

continues from the pylorus to the right body wall
deflected caudally to right kidney and pelvic inlet
passes medially behind mesentery root
ascends slightly
bends ventrally towards the mesentry

Question 2

describe the structure of the mesentery

Answer 2

coils carry veins and nerves
bunched at the origin of the cranial mesentric artery

Question 3

what are Villi

Answer 3

projections that increase epithelium SA for adsorption, lined by enterocytes

Question 4

what are crypts

Answer 4

glands (contain goblet cells) that open at the base of the villi that secrete mucus and enzymes.

Question 5

what is the highly folded mucosa that have villi projections called?

Answer 5

plicae circularis

Question 6

what else is present within the mucosa

Answer 6

lymph nodules

Question 7

describe the epithelium renewal cycle

Answer 7

epithelium mitotically divides in the cyrpts. the cells gradually ascend to the surface of the villi untill the get shed into the gut lumen

Question 8

which ducts enter the duodenum

Answer 8

liver and pancreatic