Early Indus Valley Civilization ... their Geograhpy, their customs and Indo-Aryan civilization with the earliest caste system.
Antibodies contribute to immunity in three main ways: they can prevent pathogens from entering or damaging cells by binding to them; they can stimulate removal of a pathogen by macrophages and other cells by coating the pathogen; and they can trigger direct pathogen destruction by stimulating other immune responses such as the complement pathway.
Translate. Your immune system works because your body is able to recognize self and non-self.. This means that your body is able to tell if an invader (virus, bacteria, parasite, or other another person's tissues) has entered itâeven if you aren't consciously aware that anything has happened.hese antibodies are important because the invading virus may outnumber your own immune system cells. The antibodies attach to the antigens and hold on tight. These antibodies then send a signal to other macrophages and other immune cells to come and engulf and destroy the antibody and whatever it has captured.