Immuneresponsepicture

Immune System Timeline

By ellakmehok

  • Step 1

    Step 1
    A person eats an allergen, or substance that causes an allergic reaction, and an overall negative response internally and externally.

  • Step 2

    Step 2
    When the allergen is digested, the body creates an antibody, or a protein that detects harmful substances.

  • Step 3

    Step 3
    The antibody attaches itself to cells found in tissues all over the body in order to prepare it for any other attacks from that allergen.

  • Step 4

    Step 4
    When the food allergen is digested into the again, the allergen binds to the antibodies and sends out signals to the body to release large amounts of histamine.

  • Step 5

    Step 5
    Irritation and swelling occur in certain parts of the body in result from the histamine.

  • Step 6

    Step 6
    Depending on how severe the allergy was, certain symptoms begin. Hives, itchiness, breathing problems, rash, or a fever.