Cell transplantation is a medical procedure that involves the transfer of cells from a donor to a recipient with the aim of restoring or replacing damaged or malfunctioning cells in the recipient's body. This treatment is often used in the field of regenerative medicine to treat various diseases and injuries, such as diabetes, heart disease, and spinal cord injuries. The transplanted cells can come from various sources, including bone marrow, umbilical cord blood, or embryonic stem cells. Research in cell transplantation focuses on optimizing techniques for cell isolation, culture, and transplantation, as well as improving the survival and integration of transplanted cells in the recipient's body. This area of research holds great promise for the development of new and more effective treatments for a wide range of medical conditions.