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