Non-specific

• Physical barriers are the physical characteristics of the body that prevent pathogens from entering.
• The skin is an example of a physical barrier
• Phagocytosis is an example of a non-specific defence mechanism
• Phagocytosis: the process that has phagocytes engulf large particles and digest them
• In phagocytosis, lysosomes in the phagocyte release enzymes to hydrolyse the pathogen