Foregut
Pharyx to duodenum
Midgut
Duodenum to 2/3 of transverse colon
Hindgut
1/3 of transverse colon to rectum
Rostral fold closure defect
Sternal defect
Lateral fold closure defect
Omphalocele
Gastroschisis
Caudal fold closure defect
Bladder extrophy
Duodenal atresia
Failure to canalize
trisomy 21
Jejunal, ileal, and colonic atresia
Vascular accident
apple peel atresia
Midgut development:
6th week
Midgut herniates through umbilical ring
Midgut development:
10th week
Return to abd cavity + rotates around SMA
Gastroschisis vs. omphaloceles
Omphalocele is covered by peritoneum