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HISTO > GI dev > Flashcards

GI dev Flashcards

1
Q

When does stomach rotation occur

A

week 4-6

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2
Q

when does gut rotation and umbilical herniation occur

A

week 6

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3
Q

when do intestinal loops return?

A

week 10

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4
Q

dis membrane

A

buccopharyngeal

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5
Q

dis duct

A

vitelline duct

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6
Q

deez

A

allantois and cloacal membrane

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7
Q

GI tract embryonic derivative

A

endoderm

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8
Q

muslce of viscera and connectiev tissue embryonci derivative

A

lateral plate mesoderm

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9
Q

Four parts of gut

A

pharyngeal, fore, mid, hind

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10
Q

Foregut

A

Esophagus
– Stomach
– Proximal duodenum
– Liver and Gallbladder
– Pancreas
– (Spleen)

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11
Q

Innervation of ventral and dorsal stomach

A

anterior and posterior vagus nerve

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12
Q

Celiac artery is blood supply to…

A

foregut

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13
Q

superior mesenteric artery supplies blood to

A

mid gut

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14
Q

what innervates the stomach?

A

CN X

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15
Q

Stomach
rotates….

A

Clockwise
• 90 degrees
• Week 4 – 6
• Posterior side
enlarges

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16
Q

Pancreas forms from how many buds and what kind

A

two endodermal buds which teh ventral bud moves dorsally

17
Q

Ventral bud of pancreas

A

Uncinate process
– Main pancreatic duct

18
Q

Dorsal bud

A

Accessory pancreatic
duct
– (prox. main
pancreatic duct)

19
Q

Liver Development comes from

A

hepatic diverticulum

20
Q

hepatic diverticulum goes into…

A

hepatoc cords, then liver, gallbladder, cystic duct, ventral pancreas

21
Q

midgut

A

Distal duodenum
– Jejunum
– Ileum
– Cecum
– Appendix
– Ascending colon
– Hepatic flexure
– Proximal 2/3 transverse colon

22
Q

Primary intestinal loops occurs in the…

A

midgut.

Primary intestinal loop rotates around axis formed
by the superior mesenteric artery.
– The rotation is in a counterclockwise rotation to
approximately 270 degrees when complete.
– The gut herniates into the umbilical cord at week 6
(90° CCW), returns to abdominal cavity at week 10
(180°CCW).

23
Q

Hindgut is

A

Distal 1/3 transverse colon
– Splenic flexure
– Descending colon
– Sigmoid colon
– Rectum
– Upper anal canal

24
Q

Cloaca =

A

expanded caudal
portion of the
hindgut

25
Q

Cloaca is divided by the

A

urorectal septum

26
Q

the urorectal septum into

A

rectum (dorsal) and urogenital sinus (ventral)

27
Q

Anus divides into

A

Upper anal canal
• hindgut (endoderm)
Lower anal canal
• ectoderm

28
Q

Junction between the
two parts of anus

A

pectinate line

29
Q

what is different at the pectinate line?

A

innervation, lymphatic drainage,

30
Q
A

HISTO (14 decks)

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