Ron's Crossword for science

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Across
  1. 2. message to contract or expand.
  2. 4. Resistance to a disease causing organism or harmful substance
  3. 10. Short branch like extensions on a neuron which are used to receive impulses from other cells that are
  4. 11. what Ms Asik Teaches us
  5. 12. found on tongue
  6. 17. An Immune defence that prevents pathogens from causing harm
  7. 18. Formed by neutrophils that has been killed by bacteria around an infected wound.
  8. 19. single-celled organisms, which do not completely have a nucleus
  9. 22. Foreign particles which cause harm to our body.
  10. 24. A substance that traps foreign bacteria that an individual intakes when he/she breathes.
  11. 25. contains many chemicals that break down bacteria
  12. 26. A classification of neurone(s) which function is to coordinate with the muscles, in order to send the
  13. 27. a part of the body which contains taste buds
  14. 28. bundles of neurones.
  15. 30. control centre of body
Down
  1. 1. use relay neurones to link the detector and the effector
  2. 3. most complex structures of all the microbes. They feed off other living things.
  3. 5. very small living things
  4. 6. to the cell body.
  5. 7. occupies 80% of brain and contains over 10 billion neurones
  6. 8. Transmitted by sexual contact, blood transfusions, contaminated needles
  7. 9. part of brain which controls motor function
  8. 11. known as the epidermis, forms a shield against invaders and secretes chemicals that kill potential invaders.
  9. 13. use relay neurones to link the detector and the effector
  10. 14. responsible for eating foreign particles by engulfing them
  11. 15. lower half of the brainstem
  12. 16. carries out the response.
  13. 20. Discovered in 1983
  14. 21. Antigens are deliberately introduced into the immune system to produce immunity
  15. 23. carries an electrical impulse along its axon.
  16. 29. organism which does not display ALL the characteristics of living things.