Body

NOSTRIL

A nostril is one of the two openings of the nose through which air enters the respiratory system. Tiny hairs and mucus inside filter dust and germs from the incoming air. The two nostrils often alternate dominance in a natural cycle called the nasal cycle.

NOSTRIL is the kind of word that shows up in themed word searches like Strands. Themed puzzles group words like this under a shared category — here, Body.