Embryology of Gastrointestinal tract

Question 1

What three parts does the alimentary tract consist of?

Answer 1

foregut
midgut
hindgut

Question 2

What does the foregut form?

Answer 2

distal esophagus, stomach, and part of duodenum

Question 3

Where does the foregut run?

Answer 3

ends within second part of duodenum at the entrance of the bile duct

Question 4

Where does the midgut run?

Answer 4

begins at entrance of bile duct into second part of duodenum and ends with right 2/3 of transverse colon

Question 5

Where does the hindgut run?

Answer 5

begins with left 1/3 of transverse colon and ends in upper part of anal canal

Question 6

What is the blood supply of the foregut?

Answer 6

branches of celiac trunk

Question 7

What is the blood supply of the midgut?

Answer 7

branches of the superior mesenteric artery

Question 8

What is the blood supply of the hindgut?

Answer 8

branches of the inferior mesenteric artery

Question 9

What is the sympathetic innervation of foregut?

Answer 9

greater spanchnic nerves (T5-T9)

lesser splanchnic nerves (T10-T11)

Question 10

What is the sympathetic innervation of midgut?

Answer 10

greater spanchnic nerves (T5-T9)

lesser splanchnic nerves (T10-T11)

Question 11

What is the sympathetic innervation of hindgut?

Answer 11

lumbar splanchnic nerves (L1-L2)

Question 12

What is the parasympathetic innervation of the foregut?

Answer 12

vagus

Question 13

What is the parasympathetic innervation of the midgut?

Answer 13

vagus

Question 14

What is the parasympathetic innervation of the hindgut?

Answer 14

pelvic splanchnic nerves (S2-S4)

Question 15

Sympathetic activation _______ motility and tone and ________ sphincters

Answer 15

decreases, contracts

Question 16

Parasympathetic activation ________ motility and tone and _________ sphincters

Answer 16

increases, relaxes