Regeneration is a biological process by which living organisms replace or restore damaged or lost tissues, organs, or limbs. This process is common in certain animals, such as starfish, salamanders, and planarian worms, which have the ability to regrow body parts after injury. In the field of regenerative medicine, researchers study how to harness the natural regenerative abilities of organisms to develop new therapies for treating injuries, diseases, and other conditions in humans. This can involve using stem cells, growth factors, or other biological materials to stimulate the regeneration of damaged tissues. Regeneration research also extends to the study of tissue engineering, where scientists create artificial tissues and organs in the laboratory for transplant and regenerative purposes. This field holds great promise for revolutionizing healthcare by providing new ways to repair and replace damaged tissues in the human body.