The mechanism of blood in a transplant rejection is that it produces antibodies, while the mechanism of skin during a transplant rejection is it produces CMI, (cell-mediated immunity) which is the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.
Rather, cell-mediated immunity is the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen. Antibodies (isohaemagglutinins) Blood CMI Skin 
