Launch defense

Immune System Timeline

By sumsum1213
  • Step 1

    Step 1

    A person eats a food or substance that causes an allergic reaction for the first time.
  • Step 2

    Step 2

    The person swallows the food or substance and then the body creates an antibody or a protein that can detect the harmful substance.
  • Step 3

    Step 3

    Then the antibody attatches to the cells found in tissues all over the body. This prepares the body to expect the food or substance if it enters the body again.
  • Step 4

    Step 4

    When the food or substance enters the body again, it attaches to antibodies. It then sends out signals to the body and releases large amounts of histamine.
  • Step 5

    Step 5

    The histamine then causes swelling and irritation in some parts of the body.
  • Step 6

    Step 6

    The result of histamine can vairy from person to person. It can range from mild hives to anaphylaxis.