2.3 GI Development Flashcards Preview

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Flashcards in 2.3 GI Development Deck (22):
1

The primitive gut tube is suspended within the peritoneal cavity of the embryo by ...

Ventral and dorsal mesenteries

2

What does the ventral mesentery form?

Lesser omentum & falciform ligament

3

What 4 structures does the dorsal mesentery form?

Greater omentum, mesentery proper, transverse mesocolon, sigmoid mesocolon

4

What supplies the foregut?

Celiac trunk & vagus nerve

5

What does the foregut form? (6)

Esophagus, stomach, liver, gall bladder, pancreas, upper duodenum

6

The dorsal part of the stomach grows faster than the ventral part, resulting in ...

Greater and lesser curvatures of the stomach

7

The rotation of the stomach 90 degrees to the right causes the left vagus nerve to become the ...

Anterior Vagal Trunk

8

The rotation of the stomach 90 degrees to the right causes the right vagus nerve to become ...

Posterior Vagal Trunk

9

The left side of the peritoneal cavity is stretched to form the...

Greater peritoneal sac

10

Pancreas develops as two outgrowths of the foregut, they are called...

Dorsal and ventral pancreatic buds

11

What is the effect of gut rotation on the pancreatic buds?

Carries the ventral bud posterior to the dorsal bud and they fuse

12

The pancreas becomes ... Due to gastric and duodenal rotation and return of midgut to the abdomen from the amniotic cavity

Secondarily retroperitoneal

13

Which pancreatic bud becomes the head of the pancreas and most of the main pancreatic duct?

Ventral

14

Ventral and dorsal pancreatic buds usually anastomoses to form the...

Main pancreatic duct

15

What supplies the midgut?

SMA & vagus nerve

16

The midgut forms what 6 organs?

Lower duodenum, small intestine, cecum, vermiform appendix, ascending colon & transverse colon

17

The U shaped loop of the midgut rotates 270 degrees around what?

SMA

18

What portion of the intestines is the first portion to re-enter the peritoneal cavity and comes to lie on the left side?

Jejunum

19

The cecum is the last part of the gut to return and initially lies where?

RUQ under the liver

20

What supplies the hindgut?

IMA & pelvic splanchnic nerves (S2-S4)

21

The hindgut forms what 4 structures?

Descending colon, sigmoid colon, rectum, & upper anal canal

22

What is formed by the incorporation of the dorsal part of the endoderm of the yolk sac into the embryo

Primitive gut tube