This printable word search puzzle on the topic of Human Body Systems contains 17 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.
Passive acquired immunity
Interstitial fluid
Acquired immunity
Natural immunity
Lymph vessels
Thoracic duct
Lymph nodes
Lymphocytes
Vaccination
Antibodies
Macrophage
B cells
T cells
Tonsils
Spleen
Thymus
Lymph