How is regeneration different from wound healing?

In biology, the distinction between regeneration and wound healing lies primarily in the extent and nature of the tissue restoration.

Regeneration

Regeneration is the process of replacing or restoring lost or amputated body parts with new cells that are identical to those destroyed. At its most complete level, this allows some organisms to regrow entire organs or appendages, such as a salamander regenerating a lost limb. In humans, cellular regeneration occurs when specific cell types multiply to replace those lost to injury or disease, provided the tissue structure is simple enough to be reconstructed.123

Wound Healing

Wound healing is a broader, fundamental process that occurs when tissue is damaged. While it is considered a form of regeneration at the tissue level—such as when a cut heals or a bone fracture knits—it often results in scar formation rather than the perfect replacement of original tissue.12

When damage is substantial or the original tissue architecture cannot be successfully reconstructed, the body initiates a repair process. This involves the formation of granulation tissue and the production of collagen by fibroblasts, which creates a fibrous scar to restore mechanical strength and close the wound. Unlike true regeneration, this repair process does not always restore the original function or structure of the damaged area.31