The Nervous System

1234567891011121314151617181920212223
Across
  1. 1. A small bone of the middle ear that transmits sound to the inner ear
  2. 4. A small bone of the middle ear that transmits sound to the inner ear
  3. 7. A column of nerve tissue that runs from the base of the skull down the center of the back
  4. 9. The body’s central command organ
  5. 10. A fluid filled organ of the inner ear, vibrates, sending electrical impulses to the brain
  6. 12. Connects the brain to the spinal cord
  7. 13. The sole function of which is to focus light rays onto the retina
  8. 14. Allows the brain to communicate with the rest of the body
  9. 16. Is responsible for involuntary functions, such as heartbeat, digestion
  10. 19. A thin membrane separating the outer ear from the middle ear
  11. 20. Branches of the cell body; they receive info from other neurons and create an impulse
  12. 21. Made of structures that control the actions and reactions of the body
  13. 22. Largest part of the brain; controls speech, though, memories
  14. 23. Second largest part of the brain; processes information from the body
Down
  1. 1. Responsible for voluntary control of muscle movement
  2. 2. Contains millions of photoreceptors and other nerve cells that receive and organize visual information
  3. 3. React to five basic tastes, such as sweet and salty
  4. 5. Specialized cells for detecting light
  5. 6. Extensions of the cell body that carry impulses away
  6. 8. Opening in the center of the eye; changes size to let light into the eye
  7. 11. At the end of the axon where the signal is changed from electrical to chemical
  8. 15. A small bone of the middle ear that transmits sound to the inner ear
  9. 17. React to chemicals in the air, which the brain interprets as odor
  10. 18. A cell that moves messages in the form of fast-moving electrical energy, called impulses