This printable crossword puzzle on the topic of Human Body Systems has 11 clues. Answers range from 6 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
breathing in
breathing out
another name for windpipe
another name for voice box
protects lungs
protects heart and lungs
portable treatment device
fastest growing population of smokers
air enters here
small air sacs
stops food from entering airway