Two general types of immunity are recognized – natural immunity and acquired immunity. The word “immune” is derived from the Latin stem immuno, meaning safe, or free from. In its most general sense, the term implies a condition under which an individual is protected from disease. This does not mean, however, that one is immune […]
Organ and tissue transplantation is an important treatment procedure. The tissue or organ transplanted is called a transplant or graft. The organism from which the transplant is taken is called a donor, while the individual on whom it is done is called a recipient. Antigens present in the RBC are also found widely in other […]
Non-specific defenses are the body’s first line of defense against diseases. They are not directed against a particular pathogen. Non-specific defenses guard against all infections, regardless of their cause. It is also called as innate immunity (Fig. 2). Plants and many lower animals rely only on innate immunity and do not possess the second category […]
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