When the body is invaded by antigens,the immune system forms substances called

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Antibodies are substances formed by the immune system in response to invasion by antigens, and they bind to the specific antigens to neutralize and eliminate them. Macrophages and lymphocytes are also important components of the immune system, but they do not directly form antibodies. Helper cells are a type of lymphocyte that play a role in activating other immune cells, but they do not form antibodies themselves.

When the Body Is Invaded by Antigens,the Immune System Forms