2.3 GI Development Flashcards

1
Q

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

A

Ventral and dorsal mesenteries

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2
Q

What does the ventral mesentery form?

A

Lesser omentum & falciform ligament

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3
Q

What 4 structures does the dorsal mesentery form?

A

Greater omentum, mesentery proper, transverse mesocolon, sigmoid mesocolon

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4
Q

What supplies the foregut?

A

Celiac trunk & vagus nerve

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5
Q

What does the foregut form? (6)

A

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

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6
Q

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

A

Greater and lesser curvatures of the stomach

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7
Q

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

A

Anterior Vagal Trunk

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8
Q

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

A

Posterior Vagal Trunk

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9
Q

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

A

Greater peritoneal sac

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10
Q

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

A

Dorsal and ventral pancreatic buds

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11
Q

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

A

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

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12
Q

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

A

Secondarily retroperitoneal

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13
Q

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

A

Ventral

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14
Q

Ventral and dorsal pancreatic buds usually anastomoses to form the…

A

Main pancreatic duct

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15
Q

What supplies the midgut?

A

SMA & vagus nerve

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16
Q

The midgut forms what 6 organs?

A

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

17
Q

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

A

SMA

18
Q

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

A

Jejunum

19
Q

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

A

RUQ under the liver

20
Q

What supplies the hindgut?

A

IMA & pelvic splanchnic nerves (S2-S4)

21
Q

The hindgut forms what 4 structures?

A

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

22
Q

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

A

Primitive gut tube