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 2011, 96 people age 65 and older served as living kidney donors in the United States; altogether, 1,382 older adults have done so since 1988, according to data from the United Network for Organ Sharing, which manages the nationâs transplant system.n some parts of the country, it can take six to eight years for someone to rise to the top of transplant lists, according to transplant surgeons. The harsh reality is that more than half of kidney transplant candidates over the age of 60 will die before receiving an organ from a deceased donor, researchers estimate.