This printable word search puzzle contains 16 hidden words in a 24x24 letter grid. Words go horizontally, vertically, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
hydrogen sulfide
hydrogen cyanide
carbon monoxide
bronchial tubes
nasal cavity
suffocation
choking
trachea
pharynx
hypoxia
oxygen
larynx
smoke
lungs
cilia
copd