Immunology

Immunology is the study of the body’s in-built defence mechanism- the immune system. The immune system protects the individual from infection through various lines of defence, including the skin, fortified by substances secreted by the body, such as saliva and tears, that contain molecules that can destroy bacteria, internal mucosal layers in the lungs & airways, and the gastrointestinal tract are coated with mucus that is able to trap potential pathogens. Mobile ciliate hairs in the airways work together to transport contaminants away from defenceless areas. The skin, mucosal layers and airways also contain immune cells populations that attack and neutralize pathogens that breach the physical defences.