Respiratory System Crossword

This printable crossword puzzle on the topic of Human Body Systems has 20 clues. Answers range from 5 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Lack of oxygen in tissues
Collapsed lung
spasm of the diaphragm
whooping cough
voice box
space at the back of nasal cavity
air sacks
divides left and right nostrils
tubes from trachea to lungs
respiratory center of the brain
pause in breathing during sleep
windpipe
spaces within skull bones
keeps alveoli from collapsing
illness caused by smoking
test that measures air volume
inflammation of air passages
prevents food from entering air passages
protects lungs from friction
muscle used for breathing