Respiratory System Crossword

This printable crossword puzzle on the topic of Human Body Systems has 13 clues. Answers range from 4 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Microscopic air sacs in the lungs (7)
Branching tubes leading to the lungs (7)
The _____ system takes in oxygen and gets rid of carbon dioxide (11,6)
Main organ of the respiratory system (5)
Needed by cells to break down food and release energy (6)
Waste gas that needs to be removed from the body (6,7)
Scientific word for windpipe (7)
Scientific word for voice box (6)
Site where air enters the body and is cleaned by hairs and mucus (4)
Muscular organ that helps pull the air into the lungs (9)
Breathing in (6)
Breathing out (6)
Lines the respiratory tract and helps trap germs and dust (5)