1. Special Senses: The Eyes and Ears
Chapter 11

2. Overview of Structures, Combining Forms, and Functions of the Eyes and Ears

3. Eyes (and Vison) Primary Function Related Word Parts (Combining Forms)
Receptor organs for the sense of sight
Related Word Parts (Combining Forms)
opt/i, opt/o, optic/o
ophthalm/o

4. Structures of the Eyes Adnexa: structures outside the eyeball
Orbit, eye muscles, eyelids, eyelashes, conjunctiva, lacrimal apparatus
Eyeball: also known as the globe
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5. Structures of the Eyes
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6. Structures of the Eyes
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7. Structures of the Eyes
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8. Structures of the Eyes

9. Lacrimal Apparatus Primary Function
Produces, stores, and removes tears
Related Word Parts (Combining Forms)
dacryocyst/o
lacrim/o

10. Iris Primary Function Related Word Parts (Combining Forms)
Controls the amount of light entering the eye
Related Word Parts (Combining Forms)
ir/i, ir/o
irid/o
irit/o

11. Lens Primary Function Related Word Parts (Combining Forms)
Focuses rays of light on the retina
Related Word Parts (Combining Forms)
phac/o
phak/o

12. Retina Primary Functions Related Word Parts (Combining Forms)
Converts light images into electrical impulses and transmits them to the brain
Related Word Parts (Combining Forms)
retin/o

13. Ears (Hearing and Sound)
Primary Function
Receptor organs for the sense of hearing
Help to maintain balance
Related Word Parts (Combining Forms)
acous/o, acoust/o
audi/o, audit/o
ot/o

14. Structures of the Ears

15. Outer Ear Primary Function Related Word Parts (Combining Forms)
Transmits sound waves to the middle ear
Related Word Parts (Combining Forms)
pinn/i

16. Middle Ear Primary Function Related Word Parts (Combining Forms)
Transmits sound waves to the inner ear
Related Word Parts (Combining Forms)
myring/o
tympan/o

17. Inner Ear Primary Function Related Word Parts (Combining Forms)
Receives sound vibrations and transmits them to the brain
Related Word Parts (Combining Forms)
labyrinth/o

18. Key Word Parts and Definitions
blephar/o
eyelid
-cusis
hearing
irid/o
iris, colored part of eye
kerat/o
horny, hard, cornea
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19. Key Word Parts and Definitions
myring/o
tympanic membrane, eardrum
ophthalm/o
eye, vision
-opia
vision condition
opt/o
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20. Key Word Parts and Definitions
ot/o
ear, hearing
phak/o
lens of eye
presby/o
old age
retin/o
retina, net
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21. Key Word Parts and Definitions
scler/o
sclera, white of eye, hard
trop/o
turn, change
tympan/o
tympanic membrane, eardrum

22. Questions

23. Question
The smallest bone in the body is the stapes, or stirrup bone, of the middle ear.
True or False?

24. Answer
True

25. Question
A ringing, buzzing, or roaring sound in one or both ears is called:
tinnitus
labyrinthitis
tintinitus

26. Answer
a. tinnitus

27. Question
Men are how many times more likely to be color-blind than women? 2 10 5

28. Answer
b. Men are 10 times more likely to be color-blind.

29. Question
If not treated promptly, open-angle glaucoma can cause blindness in as little as 2 days.
True or False?

30. Answer
False: Closed-angle, or acute, glaucoma can cause sudden blindness if not treated immediately.