Regeneration of hydra from reaggregated cells.
D000818:Animals; D002449:Cell Aggregation; D002452:Cell Count; D002454:Cell Differentiation; D004847:Epithelial Cells; D006829:Hydra / Q000166:cytology / Q000502:physiology*; D008938:Mitosis; D009024:Morphogenesis; D009474:Neurons / Q000166:cytology; D012038:Regeneration