Together [Dropdown 1] Trap(s)and [Dropdown 2] Remove Microbes and Dust

question 17

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

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Definitions:

Length

A measurement of how long something is from end to end, typically measured in units such as meters, feet, or inches.

Conservation

In cognitive development, the understanding that certain properties of objects remain the same despite changes in the object's appearance.

Number

A mathematical object used to count, measure, and label.

Reversibility

The ability in cognitive development to understand that numbers or objects can be changed and returned to their original condition.