Across
- 5. an injection to protect children and adults against harmful infections and helps to keep children stay healthy.
- 6. a vessel that is vein-like that conveys lymph inside the body.
- 10. a white blood cell that absorbs harmful microorganisms or waste material.
- 12. large proteins made to identify and help remove viruses and bacteria.
- 14. a kingdom of organisms consisting of unique cellular.
Down
- 1. colourless cells found in the blood and formed in lymphoid tissue.
- 2. an infection spreading rapidly and extensively, affecting many individuals.
- 3. parasites of living things that often cause diseases.
- 4. an unusual substance or toxin that enters the body which then causes the body’s immune system to produce antibodies.
- 7. an agent that causes diseases such as fungus and bacterium.
- 8. an ability of an organism to resist diseases.
- 9. the glands that produce tears.
- 10. a disease that affects a large proportion of a population over a wide geographical area.
- 11. substance which makes a body immune to pathogen and viruses.
- 13. tiny living microorganisms that live on every living thing and may be disease-causing or not.