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Today at 6:35 PM
Biology

Answered

1. What is the first line of defense against infection for the human body?
A. white blood cells
B. saliva
C. skin
D. red blood cells

Answer :

ardobbs5 ardobbs5

Today at 6:41 PM

White Blood cells or WBC's are the cells of your immune system. They are your first defense in fighting off foreign invaders and infectious diseases.

-Medical Student (College Level)

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