immune stystem timeline

Step 1

17

a person eats an substance that causes an allergic reaction for the first time

step 2

17

when the person eats the substance the body creates an antibody or a protein that detects harmful substances

step 3

17

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

step 4

17

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

step 5

17

the histamine causes irritation and swelling in parts of the body

step 6

17

the irritation varies in person to person from mild hives, shortness of breath, to anaphylaxis