body systems_Science Crossword

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Across
  1. 2. part of the brain were the spinal cord enters the skull
  2. 6. a substance that kills bacteria or prevents the growth of bacteria
  3. 7. a substance that speeds up the rate of a reaction without being used up in the proess
  4. 12. the system in your body that fights infections
  5. 13. the organism a parasite lives in
  6. 15. a disease that can be spread
  7. 16. the electrical message carried by a nerve cell
  8. 19. the chemical store of glucose in the liver and muscles
  9. 20. a pathogen about one hundred times smaller than a bacterium
  10. 21. any factor that stimulates a receptor and brings about a response
  11. 23. muscles or glands that put the messages into effect
  12. 26. a nerve cell
  13. 27. all the chemical reactions occurring in the cells
  14. 28. an organism that cause disease
  15. 29. a single cell with a tough skin that fungi use to spread
Down
  1. 1. an early antibiotic
  2. 3. a viral disease; symptoms include a rash of small, itchy blisters
  3. 4. very easy to spread; used to describe a diseas
  4. 5. a chemical that causes your body to react as if it had encountered a pathogen
  5. 6. the system controlling involuntary actions such as the heartbeat
  6. 8. a nerve fibre that sends nerve impulses away from the cell body
  7. 9. quick, automatic actions that protect the body from danger
  8. 10. the nerve that carries messages to the brain from the retina at the back of the eye
  9. 11. chemical substances that act as a messengers in the body
  10. 14. the common name for the hormone epinephrine
  11. 17. an organism that lives on or in the body of another organism and takes nutrients from
  12. 18. a viral disease that causes a rash
  13. 22. a white blood cell that consumes pathogens
  14. 24. the part of the neurone that contains the nucleus
  15. 25. able to make the antibodies to a pathogen before it can make you unwell