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, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
lymphatic vessels
lymphatic system
thymus gland
erythrocytes
Bone marrow
lymph nodes
leukocytes
hematology
platelets
pathogen
immunity
tonsils
spleen