title: A histological and ultrastructural study of germinal differentiation of interstitial cells arising from gland cells in Hydra viridis.
mesh_terms: D002454:Cell Differentiation; D002455:Cell Division; D003063:Cnidaria / Q000196:embryology*; D005854:Germ Cells / Q000166:cytology*; D008854:Microscopy, Electron