immune system.

By chloe.dal

  • 1st.

    1st.
    A person eats an allergen, or substance that causes an allergic reaction for the first time.

  • 2nd.

    2nd.
    When the person eats the allergen, the body creates an antibody, or a protein that detects harmful substances.

  • 3rd.

    This antibody attaches itself to cells found in tissues all over the body in order to prepare the body for if that allergen enters the body again.

  • 4th.

    When the food allergen enters the body again, the allergen binds to the antibodies and sends out signals to the body to release large amounts of histamine.

  • 5th.

    The histamine causes irritation and swelling in parts of the body.

  • 6th.

    The result of this irritation varies in everyone, from mild hives, shortness of breath, to anaphylaxis.