In birds and mammals, regeneration is mostly linlited to the small wounds by the formation of a new tissue, called :

Explanation

In birds and mammals, regeneration is mostly linlited to the small wounds by the formation of a new tissue, called scar. A scar is a mark left on the skin or other tissue after a wound, injury, surgery, or other trauma has healed. Scars are a natural part of the body's healing process, and they result from the replacement of damaged tissue with collagen, which is a protein that gives skin its structure and strength. Scars can vary in appearance, texture, and size, depending on various factors such as the nature of the injury, the individual's genetics, and the care provided during the healing process.It's important to note that while these treatments can improve the appearance of scars, no treatment can completely eliminate a scar. Scars are permanent, but their visibility and texture can be significantly reduced with the right approach.