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1. Which one of the following elements is considered as part of the first line of defense against microorganisms invading a body? A. Vaccine B. Saliva C. Antibodies D. White blo…

1. Which one of the following elements is considered as part of the first line of defense against microorganisms invading a body? A. Vaccine B. Saliva C. Antibodies D. White blo…
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6 votes
1. Which one of the following elements is considered as part of the first line of defense against microorganisms invading a body?

A. Vaccine
B. Saliva
C. Antibodies
D. White blood cells

asked
User Riedsio
by
8.4k points

2 Answers

9 votes
C.White blood cells

The immune system comprises three levels of defense mechanism that a pathogen needs to cross to develop infection inside the body.
answered
User Newtonx
by
7.8k points
14 votes
White blood cells would be your answer
answered
User Ronin
by
8.1k points
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