title: Formation of pattern in regenerating tissue pieces of hydra attenuata. I. Head-body proportion regulation.
mesh_terms: D000818:Animals; D002452:Cell Count; D004847:Epithelial Cells; D006257:Head / Q000166:cytology / Q000502:physiology; D006829:Hydra / Q000033:anatomy & histology / Q000166:cytology / Q000502:physiology*; D012038:Regeneration