GI development Flashcards

1
Q

define mesentery

A

two sheets of visceral peritoneum (=serosa=simple squamous epithelium=mesothelium) with CT and fat in b/w. Carry vessels and nerves to organs. Develop from splanchnopleure

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2
Q

origin of greater peritoneal sac and what it is

A

the proper abdominopelvic cavity. Forms when ventral mesentery of ventral midgut and hindgut breakdown (initially divide peritoneal into L and R halves)

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3
Q

what organs develop in the mesogastrium? What is the mesogastrium later known as?

A

Dorsal-spleen, greater omentum, lesser peritoneal sac. Ventral-liver and gall bladder, lesser omentum

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4
Q

significance of hepatoduodenal ligament? what does it contribute to?

A

contains portal triad and marks jxn of foregut and hindgut at mid-duodenum. Along, with hepatogastric ligament it makes up lesser omentum (ventral mesentery of foregut)

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5
Q

Meckel’s diverticulum

A

persistence of yolk sac stalk off of ileum. Can also be a fistula and you get lumenal connection to umbilicus. Also can be cyst, fibrous cord or volvulus. Can get infected and mimic appendicits

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6
Q

communication b/w greater and lesser sacs? where?

A

epiploic foramen of winslow under free edge of lesser omentum

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7
Q

list three adhesions of mesenteries

A

gastrocolic, phrenicocolic (suspensory ligament of spleen), hepatocolic. All connect to transverse colon

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8
Q

list fibrous cords

A

round ligaments (‘teres’) of liver and uterus, ovarian ligament

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9
Q

define primary vs secondary retroperitoneal organs and give examples

A

Primary: develop outside peritoneal cavity (kidneys, adrenal glands, aorta, ICV, bladder, prostate, vagina, rectum). Secondary: start in mesenteries then adhere to body wall (pancreas, duodenum, ascending and descending colon).

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10
Q

list the retroperitoneal structures

A

SAD PUCKER (Suprarenal gland, Ao and IVC, Dodenum (first part), Pancreas (except tail), Ureters, Colon (ascending and descending), Kidneys, Esophagus (lower 2/3), Rectum (lower 2/3)

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11
Q

foregut gastroschisis is called___

A

ectopia cordis

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