Kelompok Hewan TriploblastikAselomataPseudoselomataSelomataCacing pipihEktodermMesoderm (otot) MesenkimEndoderm (usus) Cacing giligPseudoselomOrgan internalEktodermEndoderm (usus) Mesoderm (otot) Cacing tanahEktodermSelomEndoderm (usus) Mesoderm (peritoneum) Organ internalMesoderm (otot)