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.
Donate Life America (DLA) announced today that a key goal set by the donation and transplant community in 2006 was achieved this month. The United States can now boast that 100 million Americans â roughly 42 percent of the adult population âare registered as organ, eye and tissue donors in state donor registries. Growth in the number of registered donors is vital because the need for transplants continues to rise.