Immune System Crossword Puzzle

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Across
  1. 6. The ___ T cell is like a ninja. It destroys cancer cells and virus-infected cells.
  2. 7. The ___ T cell stops the fighting once the germs are destroyed.
  3. 8. These are alive. They are tiny prokaryotic cells. These cells have cell walls. Some species are dangerous, but most are very good. Antibiotics can be used to treat an infection.
  4. 10. The ___ T cell is a retired soldier that remembers the enemies of the past. These cells will sound the alarm if the germs return.
  5. 11. Skin, hair, tears, mucus all prevent germs from entering the body. They are ___.
  6. 12. All T cells go to school in this organ near the heart. T cells mature at this school.
Down
  1. 1. The ___ T cell is like a general. It controls all other white blood cells.
  2. 2. These cells, found in the lymph nodes, produce antibodies. The cells are like mousetrap factories.
  3. 3. This is a big eater. It is like pacman. It is like a guard, custodian and police officer.
  4. 4. This is like a fingerprint. It is a code or symbol that identifies the invader.
  5. 5. A ____ is a very tiny germ that is neither dead nor alive. It uses your cells to reproduce and we get sick.
  6. 9. This is like a trap that is made by B cells. These traps attach and slow invaders down so macrophages can gobble them up.