This printable crossword puzzle on the topic of Human Body Systems has 12 clues. Answers range from 4 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
smoking these are very bad for your lungs
__is a waste product that is removed from your body
breathe in
a tube that air travels through in your nose or mouth to your lungs
lungs take this from the air and puts it into your blood
many small blood vessels
a muscle that helps you breathe
the air you inhale fills tiny ___ in your lungs
lungs are located in your chest behind these
lungs play a very important role in this system
avoid air ___ to protect your lungs
this is when you breathe out