or cellular immunity, occur through the T-cell system. On exposure to an antigen, the lymphoid tissues release large numbers of activated T cells into the lymph system. These T cells pass into the general circulation. There are three main groups of T cells: (a) helper. (b) cytotoxic T cells: which attack and kill microorganisms and sometimes the body's own cells.
Organ Donation Day. About Organ Donation Day. Organ Donation Day in India is celebrated on 13th of August every year by the people, government organizations and other related professions in order to motivate normal human beings to donate the organs as well as to understand the value of organ donation in the life of an individual.
In 1988, Iran began to allow live organ donors to be compensated, and the waiting list for recipients needing renal (kidney) transplants plummetted to zero in 1999 -- since 1999, no one needing a kidney transplant in Iran has had to wait for a donor. pointed to the Iranian example as proof that compensated organ donation works in terms of ending the deadly waiting list and saving recipients' lives that would be lost if they relied on cadaver organs.