This printable word search puzzle on the topic of Human Body Systems contains 13 hidden words in a 24x24 letter grid. Words go horizontally, vertically, and backwards. This word search is also available to download as a Microsoft Word document or a PDF.
white blood cells
red blood cells
cardiovascular
pulmonary vein
renal artery
heart attack
pulse pump
vena cava
kidney
blood
lungs
aorta
heart