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Regeneration is the process by which the body is able to regrow tissue lost by disease or trauma from the remaining tissue(s). Regeneration is termed complete when the replaced tissue is the same structurally and functionally as the original. It is incomplete when there is a compromise in either appearance or performance. As adults, humans have some ability to regenerate a few organs, such as the liver, but there are many other human tissues that do not regenerate. On the other hand, if a fetus loses any part of its extremities, that part completely regenerates in the womb without any scarring.

Complete regeneration in adult humans does not take place possibly because of a process called scarring, whose process helps to repair damaged tissue in a ...

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