2nd Year Medicine- IBLS Module May 2008ImmunityDefinition: The ability of the body to resist all types of organisms or toxins that damage the tissues.
Natural (innate): general protective mechanisms e.g. phagocytosis, acidic secretion and digestive enzymes of the GIT, resistance of the skin to invasion, etc...
Acquired: the ability to develop powerful protective mechanisms against specific invading agents e.g. lethal bacteria and viruses.