title: Regeneration in Hydra viridis with multiple-gastric region grafts: reversal of the middle piece.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D006084:Graft Rejection; D006257:Head / Q000502:physiology; D006829:Hydra / Q000166:cytology / Q000276:immunology / Q000502:physiology*; D009024:Morphogenesis; D012038:Regeneration; D013270:Stomach / Q000502:physiology