Histamines are chemicals released by the body as an allergic response.They help the body by reacting when their are "intruders" so when enters, histamine acts as a messenger and sends out a signal for the body to create a reaction helping to get rid of teh intruder through some type of reaction.
Answer:
most common samples used today Blood and Hair
A im guessing? soz if i get it wrong.
I think that the answer is 40...................................
