The complexity of Hydra: homeostasis, morphogenesis, controls and integration.
D000818:Animals; D002452:Cell Count; D002455:Cell Division; D005246:Feedback; D006706:Homeostasis; D006829:Hydra / Q000254:growth & development / Q000502:physiology; D009024:Morphogenesis; D012038:Regeneration; D012100:Reproduction, Asexual