1. what is the first line of defense against infection for the human body?
a. white blood cel...
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Biology, 04.11.2019 21:31, allisonklinger1786
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](/tpl/images/cats/otvet.png)
Answers: 2
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