This printable word search puzzle on the topic of Human Body Systems contains 16 hidden words in a 24x24 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
blood vessels
capillaries
respiration
diaphragm
nutrition
windpipe
arteries
trachea
thorax
oxygen
mouth
cells
lungs
veins
heart