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31 Cards in this Set
- Front
- Back
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Lesser Sac is formed by
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1) Rotation of stomach and
2) Secondary fusion of duodenum to the posterior body wall |
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Development of the duodenum comes from...
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1) Caudal part of the foregut
2) Cranial part of the midgut 3) Splanchnic mesenchyme |
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What are the derivatives of the midgut?
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1) small intestines
2) cecum 3) vermiform appendix 4) ascending colon 5) Proximal 2/3 of transverse colon |
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How does the duodenum and pancreas become retroperitoneal?
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Through the rotation of the stomach and duodenum
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What organ is secondarily retroperitoneal?
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Ascending colon
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Short finger like projections, fibrous cord, containing cyst or sinus...these are all characteristics of what?
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Merckel's diverticulum
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Persistence of herniation of abdominal contents into proximal part of umbilical cord is characteristic of what?
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Congenital omphalocoele
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What happens in an umbilical herniation?
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umbilicus does not close properly and midgut protrudes. it does eventually disappear though.
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What is gastroschisis
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1) Incomplete closure of lateral folds
2) Allows gut to protrude into amniotic cavity |
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What are the derivatives of the hindgut
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1) distal 1/3 of transverse colon
2) descending colon 3) sigmoid colon 4) rectum 5) superior portion of anal canal 6) epithelium of urinary bladder 7) most of urethra |
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How do you characterize Hirschspring's disease?
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Neonatal obstruction of colon. Large abdomen. Much more common in males and affects the
1) rectum 2) sigmoid colon |
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How is the greater curvature formed?
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Differential growth (dorsal side grows faster)
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What does rotation of the stomach do?
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90 CW rotation along the longitudinal axis --> greater curvature shifts left
Rotation around the dorsoventral axis --> greater curvature pushes inferiorly |
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Where do the liver and gall bladder start their formation?
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By budding off the duodenum
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How does the common bile duct form?
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Formed by the openings of hepatic and cystic diverticula
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Hepatic diverituculum buds from which part of the duodenum?
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ventral surface
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Common bile ducts is formed by
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endoderm around openings of hepatic and cystic diverticulum
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Ventral pancreatic bud sprouts from what?
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Cystic diverticulum
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What does the duct of the ventral pancreatic bud connect with?
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Common bile duct
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At which week does the ventral bud and proximal end of the common bile duct fuse with the dorsal side?
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5th week
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What does the uncinate process originate from?
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Ventral pancreatic bud
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What does the dorsal bud of the pancreas become?
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head body and tail of pancreas
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The ducts of the ventral and dorsal bud fuse to form which duct?
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Main pancreatic duct
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The remaining ducts of the dorsal bud become what?
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minor (accessory) pancreatic buds
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Ventral and dorsal pancreatic bud come from different areas but because of _____ of the stomach they start to _____.
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Rotation
Fuse |
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How is the lesser sac (omental bursa) formed?
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1) Rotation of the stomach
2) Secondary fusion of duodenum to the posterior body wall |
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The spleen is derived from a mass of ______ cells between layers of _____ mesentery
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1) mesenchyme
2) dorsal |
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During rotation of the midgut, rapid elongation of ileum does what?
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Throws midgut into dorsoventral hairpin loop (primary intestinal loop, midgut loop)
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During rotation of the midgut while the loop forms, what appears at the caudal end?
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Cecum
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What is the main cause for a physiological umbilical herniation?
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Lack of room in abdomen for developing gut, liver and kidneys
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What is D.Meckel's diverticulum?
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Remnant of vitteline duct (yolk stalk) it is normally regressed between 5th and 8th week of life.
Short finger like projection fibrous cord remain patent creating a umbilico-intestinal fistula may contain a sinus or cyst True diverticulum contains all layers of intestinal wall |
