Reparative Regeneration
This type of regeneration, as the name suggests, involves repair of a wound or replacement of a body part removed intentionally or because of injury. This kind of regeneration may include restoration of parts of an organ or an organ like in regeneration of eye and lens in amphibians or parts of the complete organism as in limbs of urodeles, or it may be the regeneration of an whole organism from a pan detached from the parent body as you will see in hydra. The power of this kind of regeneration is not found uniformly in all animals. Some have great powers of such type of regeneration; in others it is limited to varying degrees and in yet others it is not found at all. This deals primarily with the phenomenon of reparative regeneration, usually referred to simply as regeneration as found in various invertebrates and vertebrates.