Embryo midgut

Question 1

derivatives of embryo midgut

Answer 1

duodenum distal to bile duct, jejunum, ileum, cecum, appendix, AC, proximal TC

Question 2

blood supply to midgut

Answer 2

SMA

Question 3

4 stages of development

Answer 3

1. straight gut tube
2. herniate into yolk sac (wk 6)
3. rotate (total 270 degrees counterclockwise)
4. squishalate

Question 4

2 loops of midgut defined by which axis?

Answer 4

1. cranial
2. caudal

defined by vitelline duct/ yolk sac stalk and SMA

Question 5

which loop grows faster and returns to the abdomen first?

Answer 5

cranial

Question 6

wk 10- rotation during return of midgut to abdomen?

Answer 6

additional 180 degrees counter clockwise

total 270 degrees

so cranial limb is on right side and caudal limb is on left

Question 7

cecum derived from?

Answer 7

cecal diverticulum

Question 8

appendix derived from?

Answer 8

vermiform process

Question 9

meckel’s diverticulum

Answer 9

connection between yolk stalk and gut is maintained

• gut can twist on itself

Question 10

omacephale

Answer 10

fistula between umbilicus and gut

guts can herniate out