Linked from
The 9 pages that link to Regeneration (biology), each with the reason it gives.
CrayfishRelated: Lost crayfish legs and claws can regrow across successive molts.
FlatwormRelated: Some flatworms can rebuild an entire body from a small fragment after injury.
Imaginal discRelated: Disc experiments reveal how developing tissues coordinate growth after injury.
Porcelain crabRelated: A lost appendage can be restored over subsequent molts.
Turritopsis dohrniiRelated: Its life-cycle reversal is a striking form of whole-body reorganization.