Embryo of Gut (In Class)- Cole Flashcards

0
Q

what are mesenteries?

A

reflections of parietal peritoneum onto gut tube

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1
Q

What does the endoderm make?

A

epithelial lining

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2
Q

what are secondarily reteroperitoneal?

A

things that had dorsal mesentery

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3
Q

only place that there is ventral mesentery in adults?

A

liver

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4
Q

3 segments of gut? what do they have?

A

foregut, midgut, hindgut; have own blood supply and innervation

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5
Q

foregut includes?

A

esophagus to 1/2 duodenum, liver, gallbladder, pancreas

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6
Q

forgut gets supplied by?

A

celiac artery

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7
Q

midgut is supplies by?

A

superior mesenteric artery

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8
Q

hindgut is supplied by?

A

inferior mesenteric a.

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9
Q

innervation of foregut? where does it synapse?

A

greater splanchnic n. (T5-9); celiac plexus

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10
Q

midgut is innervated by? synapses?

A

Lesser Splanchnic (T9-T12)

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11
Q

Parasympathetics to foregut and midgut? synapse where?

A

vagus n. (CN X); organ walls

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12
Q

parasympathetics to hindgut?

A

S2-4 (pelvic splanchnic n.)

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13
Q

what kind of defect is an esophageal atresia considered to be?

A

canalization

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14
Q

hypertrophic pyloric stenosis appears when? as what?

A

2-3 weeks after birth; projectile, no bilious vomit

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15
Q

where does the liver develop? what else develops there?

A

ventral mesentery; gallbladder and bile ducts

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16
Q

where does the pancreas develop

A

buds in both ventral and dorsal mesentery

17
Q

ventral mesentery gets divided into what 2 parts?

A

falciform ligament and lesser omentum

18
Q

ligamentum teres hepatis is the remnant of what?

A

obliterated left umbilical v.

19
Q

some of the things that extrahapatic biliary atresia presents with?

A

jaundice, pale stool, dark urine

20
Q

treatment of extra-hepatic biliary atresia?

A

surgical correction or transplant

21
Q

pdx1 is specific for development of what organ?

22
Q

pax4 regulates what?

A

cells that secrete insulin, somatostatin, & pancreatic polypeptide

23
Q

pax 6 regulates?

A

cells secreting glucagon

24
how does annular pancreas present?
duodenal obstruction; pancreatic buds form a ring around duodenum
25
where is ectopic pancreatic tissue most common?
stomach or ileum (ileal or Meckel's diverticulum)
26
apple peel atresias are associated with what normally?
vascular problems
27
by what week does the intestine move back into body?
week 10
28
what is an intussuception?
part of gut tube tunneled into another part
29
what is an omphalocele?
herniation of abdominal contents thru enlarged umbilical ring (normal if temporary)
30
what is gastroschisis?
failure of anterior abdominal wall musculature to close during folding
31
Prune belly occurs in what sex more frequently?
males
32
vitelline duct that doesn't close makes what?
Meckel's diverticulum, asymptomatic
33
rule of 2s?
2% prevalance, location 2 feet proximal to ileocecal valve in adults, symptomatic are usually less than 2, 2:1 female predominance?
34
fecal discharge thru umbilicus is a presentation of?
Meckel's
35
Cause of Hirschsprung's dz?
failure of migration of neural crest cells that form the colonic ganglion cells
36
where is HD common?
descending and sigmoid colon
37
if something is primarily reteroperitoneal?
never had a mesentery
38
where do "high" anal malformations occur?
above pelvic diaphragm
39
low anorectal malformations are easier to repair why?
because they have some musculature