spleen primordium
associated mesenchyme
epithelium
frenulum
intermolar eminence
median fibrous septum
mesenchyme
vascular element
lumen
floorplate
mantle layer
marginal layer
internal capsule
lamina terminalis
marginal layer
roof plate
mantle layer
marginal layer
mantle layer
marginal layer
floor plate
marginal layer
marginal layer
medullary raphe
sulcus limitans
floorplate
mantle layer
marginal layer
mantle layer
marginal layer
sulcus limitans
cerebral aqueduct
floorplate
mantle layer
marginal layer
roof plate
tegmentum
conus medullaris
filum terminale
floorplate
intermediate grey horn
marginal layer
sulcus limitans
roof plate