sandra783206 sandra783206

27-01-2021
Health

contestada

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

Respuesta :

eichmansamantha5 eichmansamantha5

27-01-2021

White blood cells would be your answer

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thegr8aaliyah thegr8aaliyah

27-01-2021

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.

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