Embryology

Question 1

which germ layer is the GI tract derived from - endoderm

Answer 1

epithelium of mucosa
associated ducts and glands
liver cells
lining of biliary cells

Question 2

role of rotation of different parts of the gut

Answer 2

brings the mesenteries into their final positions

Question 3

parts of adult tract are derived from each of the foregut

Answer 3

parts 1 and 2 of duodenum

Question 4

which adult structures the dorsal mesenteries give rise to

Answer 4

greater omentum

Question 5

which adult structures the ventral mesenteries give rise to

Answer 5

lesser omentum

falciform

Question 6

the rotation events during stomach development

Answer 6

growth and rotation creates the lesser sac and causes dorsal mesentery to bulge
duodenal loop directed to right due to rotation of stomach

Question 7

communication of midgut during development

Answer 7

communicates with yolk sac

Question 8

role of physiological rotation in midgut development

Answer 8

caecal bud forms on caudal limb

Question 9

what is the clocaca

Answer 9

contributes to the hindgut and urogenital system

Question 10

which germ layer is the GI tract derived from - visceral mesoderm

Answer 10

lamina propria
muscularis mucosa and muscularis externa
CT of submucosa and external CT
spleen

Question 11

which germ layer is the GI tract derived from - neural crest

Answer 11

ENS
Meissner’s plexus
Auerbach’s plexus

Question 12

parts of adult tract are derived from each of the midgut

Answer 12

parts 3 and 4 of duodenum
jejunum
ileum 
caecum and appendix 
ascending colon
proximal 2/3 of transverse colon