[Histological and cytological study of neoblasts and fixed parenchymal cells in Dendrocoelum lacteum planarians deprived of their anterior region].
On amputating either at the root of the pharynx or between the mouth and the genital pore, the posterior parts which are thereby isolated do not regenerate. However they are capable of surviving for ever a year, without feeding. The wounded region is occupied by neoblasts which degenerate within a few days after an initial secretory activity. Their degeneration is of autophagic type. The abortive blastems disappear only slowly, because the degeneration of their neoblasts is partly compensated by the continual immigration of new regeneration cells which come from the posterior region. Several months after amputation, under the effect of prolonged starvation, neoblasts and fixed parenchymal cells begin to degenerate.
D000818:Animals; D010932:Planarians / Q000502:physiology* / Q000648:ultrastructure; D012038:Regeneration; D014419:Turbellaria / Q000502:physiology*
Etude histologique et cytologique des néoblastes et des cellules fixes du parenchyme chez des planaires Dendroccelum lacteum privées de région antérieure