This printable word search puzzle on the topic of Human Body Systems contains 14 hidden words in a 17x17 letter grid. Words go horizontally, vertically, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
carbon dioxide
respiration
oesophagus
bronchiole
diaphragm
alveolus
trachea
oxygen
exhale
inhale
breath
heart
lungs
rib