Embryology Questions Medical School File

“1st part of maxillary, 2nd stapedial + hyoid, 3rd common carotid & proximal ICA, 4th arch: left = aortic arch, right = proximal subclavian, 6th: left = ductus arteriosus, right = proximal pulmonary”

Failure of fixation → malrotation → Ladd’s bands across duodenum → duodenal obstruction + risk of midgut volvulus (twisting around SMA). Embryology Questions Medical School

Neonate with bilious vomiting (green) → rule out malrotation until proven otherwise. Upper GI series shows “corkscrew” or “duodenal jejunal junction to the right of spine.” “1st part of maxillary, 2nd stapedial + hyoid,