chapter 8 Special Senses Crossword

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Across
  1. 5. an enzyme that catalyzes the destruction of the cell walls of certain bacteria, occurring notably in tears and egg white.
  2. 7. the mucous membrane that covers the front of the eye and lines the inside of the eyelids.
  3. 9. is the clarity or sharpness of vision.
  4. 10. The special sense which interprets the position of the head permitting the CNS to maintain stability and posture when the head and body are not moving
  5. 12. the pigmented vascular layer of the eyeball between the retina and the sclera.
  6. 17. is a group of eye conditions that damage the optic nerve, the health of which is vital for good vision.
  7. 20. The place in the brain where some of the optic nerve fibers coming from one eye cross optic nerve fibers from the other eye.
  8. 21. farsightedness.
  9. 26. the automatic adjustment of the focus of the eye by flattening or thickening of the lens.
  10. 27. a small bone forming part of the eye socket.
  11. 28. a calcareous concretion in the inner ear of a vertebrate or in the otocyst of an invertebrate.
  12. 29. a light-sensitive cell of one of the two types present in the retina of the eye, responding mainly to bright light and responsible for sharpness of vision and color perception.
  13. 31. equilibrium a state of balance between continuing processes.
  14. 32. the normal refractive condition of the eye in which with accommodation relaxed parallel rays of light are all brought accurately to a focus upon the retina
  15. 36. - a very small bone, especially one of those in the middle ear.
  16. 37. are the projection neurons of the vertebrate retina, conveying information from other retinal neurons to the rest of the brain.
  17. 38. short for crystalline lens.
  18. 39. any of the clusters of bulbous nerve endings on the tongue and in the lining of the mouth which provide the sense of taste.
  19. 40. the white outer layer of the eyeball. At the front of the eye it is continuous with the cornea.
  20. 41. coordinated movement of the two eyes so that the image of a single point is formed on corresponding retinal areas.
Down
  1. 1. a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.
  2. 2. technical term for earwax.
  3. 3. a structure in a living organism, especially a sensory cell or sense organ, that responds to light falling on it.
  4. 4. a sense organ or cell that responds to mechanical stimuli such as touch or sound.
  5. 6. the part of a hollow organ (such as the uterus or the gallbladder) that is farthest from the opening.
  6. 8. humor the clear fluid filling the space in the front of the eyeball between the lens and the cornea.
  7. 11. a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
  8. 12. is a small, inverted cup or dome-shaped cap
  9. 13. the spiral cavity of the inner ear containing the organ of Corti, which produces nerve impulses in response to sound vibrations.
  10. 14. nearsightedness.
  11. 15. is a ring of fibrous strands forming a zonule (little band) that connects the ciliary body with the crystalline lens of the eye.
  12. 16. is a tube that links the nasopharynx to the middle ear, which it is also part of.
  13. 18. a medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision.
  14. 19. humor - the transparent gelatinous tissue filling the eyeball behind the lens.
  15. 22. involves communicative functions associated with the sense of smell, such as body odors, use of perfumes, etc.
  16. 23. a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center.
  17. 24. duct carries tears from the lacrimal sac of the eye into the nasal cavity.
  18. 25. a small depression in the retina of the eye where visual acuity is highest. The center of the field of vision is focused in this region, where retinal cones are particularly concentrated.
  19. 30. (eardrum)thin layer of tissue in the human ear that receives sound vibrations from the outer air and transmits them to the auditory ossicles, which are tiny bones in the tympanic (middle-ear) cavity.
  20. 33. make light travel in slightly different direction.
  21. 34. the dark circular opening in the center of the iris of the eye, varying in size to regulate the amount of light reaching the retina.
  22. 35. a light-sensitive cell of one of the two types present in large numbers in the retina of the eye, responsible mainly for monochrome vision in poor light.