Cells At Work!

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Across
  1. 5. Memory T, NK and neutrophil cells are types of ___ cells.
  2. 6. An example of good bacteria that fixes the intestinal wall is the ___ acid bacteria.
  3. 8. A chemical released by killer T cells upon attacking infected cells.
  4. 9. One of the functions of regulatory T cells is to inhibit the attack of immune cells on fellow cells or any ___ bacteria.
  5. 10. A group of bacteria that do not cause any good or harm.
Down
  1. 1. Dangers caused by harmful bacteria include putrefaction of intestines, production of toxins and creation of ___ substances.
  2. 2. The biggest immune system in the body is the ___ tract.
  3. 3. An organ where precursor T cells are differentiated into mature, full-fledged T cells.
  4. 4. Cells that prevent killer T cells from going out of control.
  5. 7. An example of a harmful bacterium.