Siphon regeneration in Ciona.
D000818:Animals; D002938:Ciona intestinalis / Q000502:physiology*; D005260:Female; D006066:Gonads / Q000502:physiology; D008297:Male; D010786:Photoreceptor Cells / Q000502:physiology; D012038:Regeneration; D012107:Research Design; D014561:Urochordata / Q000502:physiology*