Respiratory System Crossword

This printable crossword puzzle on the topic of Human Body Systems has 10 clues. Answers range from 7 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

A muscle which contracts to increase the volume of the lungs and draw air into the lungs.
Tiny air sacs that are present at the site of gas exchange.
The windpipe - tube between throat and lungs.
The passageways by which air passes through to reach the alveoli.
The main passageways into the lungs. They break down into smaller passageways called bronchioles
Pushing air out of the lungs - breathing out.
Drawing air into the lungs - breathing in.
A thin blood vessel only one blood cell wide found at the site of gas exchange
The mechanical movement of air in and out of the lungs.
A chemical reaction taking place in all living cells