Substances that the body recognizes as foreign are called ________.

Name: Substances that the body recognizes as foreign are called ________.
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Antigens are substances that are recognized by the immune system as foreign and can trigger an immune response. Antibodies are proteins produced by the immune system to recognize and neutralize antigens. Formed elements are a general term used to describe the cellular components of blood, and megakaryocytes are specific cells involved in blood clotting.

Substances That the Body Recognizes as Foreign Are Called ________