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GI--Wk 3 > GI Embryology > Flashcards

GI Embryology Flashcards

1
Q

Sk muscle of upper esophagus is derived from what tissue

A

4th and 6th arch mesoderm

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2
Q

Sm muscle and CT is derived from what tissue

A

splanchnic mesoderm

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3
Q

Foregut
blood supply
parasympathetic innervation
adult structures

A

foregut:
celiac trunk
vagus
pharynx -> prox duodenum

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4
Q

Midgut
blood supply
parasympathetic innervation
adult structures

A

midgut:
SMA
vagus
prox duo -> right half of transverse colon

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5
Q

Hindgut
blood supply
parasympathetic innervation
adult structures

A

hindgut:
IMA
sacral splanchnics
left half of transverse colon -> sup anal canal

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6
Q

Ventral mesentery is derived from

A

transverse septum

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7
Q

This structures encloses the liver

A

ventral mesentary

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8
Q

Why is left vagus ventral and right vagus dorsal?

A

90˚ rotation of stomach clockwise

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9
Q

Potential space behind stomach

A

omental bursa

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10
Q

The spleen forms from what structure

A

dorsal mesentery

moves to left when stomach rotates

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11
Q

Pyloric stenosis

A

weeks after birth
hypertrophy of circular sm muscle
no bile in vomitus

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12
Q

Intestinal atresia/stenosis

A

failure of rencanalization (usually duodenum)
intestinal epithelial cells occlude lumen
vomitus contains bile (defect after ampulla of Vater)

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13
Q

Liver grows from…

into…

A

hepatic diverticulum

ventral mesentery

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14
Q

Fibrous capsule of is derived from

A

transverse septum

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15
Q

Extrahepatic biliary atresia results in

A

infantile jaundice

cannot get rid of bili

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16
Q

Accessory pancreatic tissue may be present in

A

Meckel diverticulum

17
Q

Meckel diverticulum may contain

A

accessory pancreatic tissue

or gastic mucosa (ulceration -> bleeding)

18
Q

Pancreatic acini develop from

A

terminal ends of pancreatic buds

19
Q

Endocrine pancreatic tissue derived from

A

budding of pancreatic ducts

20
Q

Meckel diverticulum is patent…

A

omphaloenteric duct/yolk sac

21
Q

Persistent omphaloenteric duct/yolk sac results in

A

Meckel diverticulum

22
Q

Midgut rotates how many degrees around what?

A

270˚ around SMA

23
Q

Cloaca

A

caudal hindgut and base of urogenital sinus

24
Q

Separates cloaca and proctoderm (anal canal)

A

cloacal membrane

25
Q

Perineal body

A

forms in area where urorectal septum approaches cloacal membrane

26
Q

Vascular supply to anal area

A

upper 2/3: hindgut supply, IMA

lower 1/3: proctodeum, inferior rectal a., of internal pudundal a., of internal iliac a.

27
Q

Lymph supply to anal area

A

upper 2/3: IMA nodes

lower 1/3: superficial inguinal nodes

28
Q

Hindgut fistulas

A 
connect hindgut to:
vagina
urethra
bladder
*incomplete division of cloaca from urorectal septum

GI--Wk 3 (11 decks)

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