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Anatomy lecture 3, embryology part only
Terms in this set (22)
cortex develops from?
medulla develops from?
neural crest cells
foetal cortex is formed during?
foetal cortex is formed from?
mesothelial cells b/w root of dorsal mesentery & urogenital ridge
==> prolif. & invades underlying mesoderm
adult cortex is formed from?
A second wave of mesothelial cells migrates and forms a thinner one surrounding foetal cortex
what happens by the 2nd postnatal month (after birth)?
-foetal cortex regresses rapidly
-adult cortical cells organise into zona glomerulosa & fasciculata
when does the zona reticularis become visible?
end of 3rd year of age
when is the adult structure of the cortex achieved?
chromaffin cells development
-while foetal cortex is being formed
-neural crest cells leave neural tube -> migrate ventrally
2 endodermal buds: ventral & dorsal
--from the caudal end of the foregut
when does the pancreas develop?
during 5th week
growth of ventral & dorsal buds
ventral bud into ventral mesentery
dorsal bud into dorsal mesentery
development of pancreas stages
rotation of the duodenum
to the right (becomes C shaped)
what results from the rotation of the duodenum
ventral panc bud moves dorsally w/ the bile duct
soon it lies posterior to the dorsal bud :o --> fusion
which panc. bud appears first?
most of the panc. is derived from which bud?
the ventral bud forms:
-pt of the head
the dorsal bud forms:
<rest of panc>
-remaining pt of head
Main pancreatic duct is formed by
fusion of ventral bud duct+ distal part dorsal bud duct
accessory panc duct forms from
prox. pt of dorsal bud duct
accessory panc duct is present in?
9% of ppl
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