body systems

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Across
  1. 3. part of the brain where the spinal cord enters the skull.
  2. 7. the chemical store of glucose in the liver and muscles.
  3. 13. all the endocrine glands of the body.
  4. 14. the lower half of the brain stem.
  5. 16. the part of the neurone that contains the nucleus.
  6. 17. a hormone produced in the adrenal glands.
  7. 18. all the chemical reactions occurring in the cells.
  8. 20. able to maintain a constant body temperature.
Down
  1. 1. chemical substances that act as messengers in the body.
  2. 2. the space between two neurones.
  3. 4. the cells on which a hormone acts.
  4. 5. special cells that detect stimuli.
  5. 6. glands that produce hormones.
  6. 8. the nerve pathway operating in a reflex action.
  7. 9. an organic catalyst.
  8. 10. the organelle where proteins are manufactured.
  9. 11. the common name for the hormone epinephrine.
  10. 12. the electrical message carried by a nerve cell.
  11. 15. a nerve cell.
  12. 19. a nerve fibre that sends nerve impulse away from the cell body.