Revision crossword

2. – The part of the brain that controls balance and coordination.
4. – Different forms of an enzyme that perform the same function.
5. – Acting at the right time; being prompt.
7. – A disease that spreads from animals to humans.
9. – A different form of a gene found at the same place on a chromosome.
10. – A deep cut or tear in the skin or flesh.
12. – A parasitic worm, such as a roundworm or tapeworm.
13. – A group of viruses, some of which cause respiratory disease in humans.
15. – Frequent absence from work or school.

1. – The process of making a person resistant to disease, usually by vaccine.
3. – A deadly viral disease eradicated by vaccination in 1977.
6. – Swelling of body parts caused by parasitic worms blocking lymph vessels.
8. – White blood cells that fight infection by engulfing microbes.
11. – Lymphatic tissue at the back of the nasal cavity that helps fight infection.
14. – A serious infection caused by bacteria producing muscle spasms.