Cells and Body Systems

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Across
  1. 4. specialized cells of the nervous system that receive messages
  2. 10. waste removal
  3. 11. two main branches of the trachea that lead into the lungs
  4. 12. most common type of blood cell
  5. 16. structures in cells that perform a certain function
  6. 19. small finger like projections on the inner surface on the small intestine
  7. 20. small branches of a neuron that receive info from neighbouring cells
  8. 22. removal of waste products from the blood
  9. 23. tube that leads to the bronchi
  10. 24. group of cells that perform a function
Down
  1. 1. blood vessels that carry blood away from the heart
  2. 2. living things
  3. 3. a group of tissues that perform a specific task
  4. 5. a whitish fiber or bundle of fibers that transmits impulses
  5. 6. parts of an organism that perform certain tasks
  6. 7. centre of the nervous system
  7. 8. these get rid of viruses
  8. 9. tiny blood vessels that connect arteries to veins
  9. 13. a sac that supports liquid or air
  10. 14. group of organs that perform a certain task
  11. 15. large muscle below the lungs that helps move air in and out
  12. 17. a substance that provides nourishment or essential growth
  13. 18. purpose or task
  14. 21. two bean shaped organs
  15. 25. poisonous substance converted from highly toxic ammonia by the liver