Pregunta:
The nose defends against pathogens by having _______ _____ which act as a ________ _______ to _________. _____ in the nose _______ _____ which _____ _________ before they can _____ the _____.
Autor: Ruthgreen_6Respuesta:
Internal hairs physical barrier infection cells produce mucus traps pathogens enter lungs
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Ruthgreen_6