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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:
Enzymes can only be used once
Explanation:
Enzymes are there forever
Answer:
its
"a heart on the run keeps a hand on a gun you can't trust anyone"
Answer:
Explanation:
Around every blood vessel