Short Answer
Together [dropdown 1] trap(s)and [dropdown 2] remove microbes and dust from the upper respiratory tract.
Dropdown 1 choices:
tonsils
interferons
phagocytes
mucus
sebum
Dropdown 2 choices:
cilia
saliva
lysozyme
lacrimal apparatus
granzymes
Correct Answer:

Verified
Correct Answer:
Verified
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