The immune system

This article intends to provide an up-to-date overview of the relevant physiology required to pass the FRCA. The immune system is our defence against pathogens. This includes the recognition of non-self organisms, and protection through a variety of non-specific and highly specific mechanisms. Failure of the immune system leads to immunodeficiency or immunopathology either may be catastrophic for the host.
Source: Anaesthesia and intensive care medicine - Category: Anesthesiology Source Type: research