The Neuron and the Eye

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Across
  1. 2. clear layer covering the front of the eye
  2. 3. Oval-shaped pigmented area at the center of the eye
  3. 8. Also known as the cell body or the perikaryon, is the main part of the neuron and contains the nucleus
  4. 9. Coordinates voluntary and involuntary actions by transmitting signals throughout the body
  5. 12. The colored portion of the eye that changes the size of the pupil to control the amount of light hitting the retina
  6. 13. The part of the neuron that communicates with the dendrites of the next neuron in the signal pathway
  7. 14. Farsightedness
  8. 16. The point at which the nerves innervating the eye exit, resulting in a blind spot
  9. 18. The specialized cell that transmits signals within the nervous system
  10. 19. Gelatinous fluid filling the space of the eye between the lens and the retina
  11. 23. A clear portion of the eye that refracts light in order to focus it on the retina and can change shape to focus at different distances
  12. 24. The single long process that extends from the soma, transmitting signals AWAY
Down
  1. 1. Small central pit of closely compacted cones in the middle of the macula that is responsible for much of the central vision
  2. 2. Ring of smooth muscles that controls the flow of the aqueous humor into the space between the cornea and the iris
  3. 4. The fluid that fills the space between the cornea and the iris
  4. 5. Transmits visual information from the retina to the brain
  5. 6. Blurred vision
  6. 7. The vascular layer of the eye lying between the retina and the sclera
  7. 10. Provide blood flow to the retina
  8. 11. Nearsightedness
  9. 15. receive incoming signals from other neurons
  10. 17. The hole in the center of the eye that allows light to enter and reach the retina
  11. 20. Light-sensitive tissue layer at the back of the eye where an initial image is projected upside-down
  12. 21. Opaque outer layer of the eye responsible for protecting the eye. Made of collagen and elastic fibers
  13. 22. Cells that form an insulating layer around the axon and speed along the transmission of signals from one neuron to another