6. Viruses are usually made from a small amount of _______________ in a _______________ coat.
7. When a virus attacks a cell it uses that cell to make more _____________ of the virus which then ______________ other cells.
8. Our skin acts as a _______________ and it secretes _______________ substances in sweat.
9. Our _______________ blood cells fight off infection. 10. White blood cells identify and destroy invading bacteria by _______________ them. 11. Medicines called _______________ are used to treat bacterial infections. 12. _______________ are proteins which stick to viruses and stop them from invading cells.
13. _______________ is the immune system’s ability to remember a virus. 14. Vaccinations are small injections of weak or ___________ versions of ____________. 15. Genetic illnesses are illnesses that are carried in our _______________. 16. Three genetic illnesses are: _______________, ______________ and _____________. 17. Smog is a mixture of _______________ and _______________ which makes it difficult for people to breathe.
18. The World Health Organisation estimates that there are 3 to 5 million cases of cholera each year caused by drinking _______________ ______________.
19. Good sources of fat in our diet are: _______________, _______________ and _______________.
20. Most people have too much _______________ in their diet. 21. The most healthy drink is _______________. 22. Teenagers should get at least _______________ _______________ of _______________ exercise every day.
23. Good mental health is a state of ______________ where every individual realises his or her own ______________, can cope with the ______________ ______________ of life, can work ______________ and is able to make a contribution to his or her community.
K U
Knowledge and Understanding 1. List four healthy habits a person can have and four unhealthy habits a person can have.
2. Give three illnesses that are caused by bacteria and three that are caused by viruses. 3. Describe how you would grow bacteria in a school laboratory. 4. Copy the table below and fill in two beneficial and two harmful effects of fungi.
Beneficial effects of fungi Harmful effects of fungi
