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, and backwards. This word search is also available to download as a Microsoft Word document or a PDF.
Passive Acquired Immunity
Interstitial Fluid
Acquired Immunity
Natural Immunity
Lymph Vessels
Thoracic Duct
Lymph Nodes
Lymphocytes
Vaccination
Macrophage
Antibodies
T-cells
B-cells
Tonsils
Spleen
Thymus