Coelom is a cavity inside mesoderm. Schizocoelic coelom
(schizocoel) develops as a split in the embryonic mesoderm.
Enterocoelic coelom(enterocoel) develops as mesodermal
pouches arising from the gut of the embryo.
Schizocoelom and Eneterocoelom both are the coeloms, it
means there is cavity inside the mesoderm.but the differce
is that in Schizocoelom some cells from the enteron comes
out in the embryonic stage. And these cells develop into
coelom known as schizocoelom. Whereas in Enetrocoelom the
enteron develops into two mesodermal pouches in its side
from the gut of the embryo and these pouches gradually
separate from the enteron and later on develops into a
coelom known as Enterocoelom.
In schizocoelous coelom, coelom formation occurs by the splitting of mesodermal layer.Most commonly seen in annelids,arthropodes and molluscs.
Whereas in enterocoelous coelom, coelom formation occurs from wall of the embryonic gut as hollow outgrowth.Commonly seen in echinoderms and chordates.