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26 Cards in this Set
- Front
- Back
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Which gut ends at the oropharyngeal membrane?
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Foregut
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What is the diverticulum of the hundgut?
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Allantois
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What germ layer is the parietal peritoneum formed from?
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somatic lateral plate mesoderm
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What germ layer are the mesenteries and visceral peritoneum derived from?
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splanchnic LPM
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What is the term for organs that were once intraperitoneal but merged with the dorsal abdominal wall?
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Secondarily retroperitoneal organs
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What is the ventral mesentery derived from in embryological development?
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Cauda part of the septum transversum
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Once the liver begins developing, it splits the ventral mesentery into what two sections?
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Lesser omentum and falciform ligament
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What germ layer is the muscular wall of the esophagus formed from?
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splanchnic mesoderm
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How does the stomach rotate during development?
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90 degrees clockwise around longitudinal, as well as clockwise around a dorso-ventral axis
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In what mesenteric layer does the spleen form?
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dorsal mesogastrium
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What organ do the dorsal and ventral buds of the duodenum form?
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Pancreas (ventral rotates to dorsal side)
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What does the ventral bud form on the pancreas?
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Uncinate process and inferior part of head
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What doe the dorsal bud form on the pancreas?
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Tail and superior part of head
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What presents when the ventral pancreatic bud bifurcates and surrounds the duodenum?
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Annular pancreas
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What does the hepatic diverticulum form on the ventral foregut?
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Liver
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What is the process by which the lumen of the duodenum is filled in but later cleared again?
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Recanalization
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What presents when recanalization is incomplete or hypertrophy of a sphincter occurs?
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stenosis or atresia
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What duct forms Meckel's diverticulum?
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Vitelline duct (at umbilicus)
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Vasculature of midgut?
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Superior mesenteric artery
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What type of rotation occurs within the midgut?
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270 degree rotation around the superior mesenteric artery
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When does retraction of the herniated midgut occur?
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As soon as space becomes available
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What condition presents when the midgut loop fails to retract, leaving the midgut covered by umbilical cord?
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omphocele
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Vasculature of the hindgut?
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inferior mesenteric artery
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What separates the urogenital sinus and the anorectal cavity?
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Urorectal septum
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What condition presents with a congenital megacolon due to absence of parasympathetic ganglia in the bowel wall?
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Hirschsprung disease
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What germ layer is affected in Hirschsprung disease?
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neural crest (parasympathetic nerves)
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