Immune System Timeline

By miakp

  • Step 1

    Step 1
    Allergen or substance that causes allergic reaction is injested for the first time.

  • Step 2

    Step 2
    When the allergen enters the body, the immune system creates antibodies, a protien that detects harmful substances.

  • Step 3

    Step 3
    These antibodies attach themselves to tissue cells in the body to prepare for if an allergen enters the body.

  • Step 4

    Step 4
    When another allergen enters the body the antibody sends out signals to release histamine.

  • Step 5

    Step 5
    The body then releases histamine, a organic compound in the body that causes swelling and itching in the body.

  • Step 6

    Step 6
    A person can get hives or shortness of breath from the irritation, depending on the severity of the persons allergy. For some people the allergic reaction last for only a few days but some gets worst and need serious medical attention.