Immune System Word Search Set with 15 Human Body Terms

The Immune System word search, scramble and crossword puzzle

I made this immune system puzzle set for my Year 5 students during our human body unit. The kids knew getting ill meant a fever or a runny nose but had no idea how their body fought off germs or what white blood cells did. So I put together a word search, a word scramble, and a crossword using words like antigen, antibody, white blood cell, B cell, T cell, phagocyte, vaccine, immunity, pathogen, virus, bacteria, fever, inflammation, lymph node, and spleen. Nothing fancy — just puzzles to help the vocabulary stick without scaring them.

The PDFs are six pages. Three puzzles, each with its own answer key page. The word search works well for quiet time after break. The scramble gets them talking because they argue about whether a vaccine prevents or cures a disease. The crossword I use for partners. I added a couple simple shield and germ drawings but nothing too busy.

Works for Year 5 through Year 6. Print and go. Sometimes I have early finishers name two ways the body fights germs on the back. The kids actually ask for these now.