Defence Against Pathogens: The Immune System

• In this unit we will also be looking at the main body system that is involved in the body’s immune response – the lymphatic system.

• The lymphatic system contains macrophages that digest invading microorganisms and lymphocytes which produce antibodies.

• Macrophages are part of the body’s innate immunity, which provides non-specific protection against pathogens.

• Lymphocytes are part of the body’s acquired immunity, which provides specific protection against pathogens.

• The lymphatic system, together with other structures, substances and processes involving other body systems, make up what is generally referred to as the body’s immune system.

The lymphatic system protects the body from pathogens.

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