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.
Though St. Stephenâs ceded the title of worldâs largest church organ to that of the First Congregational Church in Los Angeles in the 1990s, when it comes to matters of musical grandeur united across space and time, the organ at St. Stephenâs remains nonpareil. #musical wonders#churches.