1. © 2015, Cengage Learning. All Rights Reserved. Special Senses: The Eyes and Ears Chapter 11

2. © 2015, Cengage Learning. All Rights Reserved. Overview of Structures, Combining Forms, and Functions of the Eyes and Ears

3. © 2015, Cengage Learning. All Rights Reserved. Eyes (and Vison) Primary Function –Receptor organs for the sense of sight Related Word Parts (Combining Forms) –opt/i, opt/o, optic/o –ophthalm/o

4. © 2015, Cengage Learning. All Rights Reserved. Structures of the Eyes Adnexa: structures outside the eyeball –Orbit, eye muscles, eyelids, eyelashes, conjunctiva, lacrimal apparatus Eyeball: also known as the globe (continues)

5. © 2015, Cengage Learning. All Rights Reserved. Structures of the Eyes (continues) © Cengage Learning

6. © 2015, Cengage Learning. All Rights Reserved. Structures of the Eyes (continues) © Cengage Learning

7. © 2015, Cengage Learning. All Rights Reserved. Structures of the Eyes (continues) © Cengage Learning

8. © 2015, Cengage Learning. All Rights Reserved. Structures of the Eyes © Cengage Learning

9. © 2015, Cengage Learning. All Rights Reserved. Lacrimal Apparatus Primary Function –Produces, stores, and removes tears Related Word Parts (Combining Forms) –dacryocyst/o –lacrim/o

10. © 2015, Cengage Learning. All Rights Reserved. Iris Primary Function –Controls the amount of light entering the eye Related Word Parts (Combining Forms) –ir/i, ir/o –irid/o –irit/o

11. © 2015, Cengage Learning. All Rights Reserved. Lens Primary Function –Focuses rays of light on the retina Related Word Parts (Combining Forms) –phac/o –phak/o

12. © 2015, Cengage Learning. All Rights Reserved. Retina Primary Functions –Converts light images into electrical impulses and transmits them to the brain Related Word Parts (Combining Forms) –retin/o

13. © 2015, Cengage Learning. All Rights Reserved. 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. © 2015, Cengage Learning. All Rights Reserved. Structures of the Ears © Cengage Learning

15. © 2015, Cengage Learning. All Rights Reserved. Primary Function –Transmits sound waves to the middle ear Related Word Parts (Combining Forms) –pinn/i Outer Ear

16. © 2015, Cengage Learning. All Rights Reserved. Primary Function –Transmits sound waves to the inner ear Related Word Parts (Combining Forms) –myring/o –tympan/o Middle Ear

17. © 2015, Cengage Learning. All Rights Reserved. Inner Ear Primary Function –Receives sound vibrations and transmits them to the brain Related Word Parts (Combining Forms) –labyrinth/o

18. © 2015, Cengage Learning. All Rights Reserved. Key Word Parts and Definitions blephar/o –eyelid -cusis –hearing irid/o –iris, colored part of eye kerat/o –horny, hard, cornea (continues)

19. © 2015, Cengage Learning. All Rights Reserved. Key Word Parts and Definitions myring/o –tympanic membrane, eardrum ophthalm/o –eye, vision -opia –vision condition opt/o –eye, vision (continues)

20. © 2015, Cengage Learning. All Rights Reserved. Key Word Parts and Definitions ot/o –ear, hearing phak/o –lens of eye presby/o –old age retin/o –retina, net (continues)

21. © 2015, Cengage Learning. All Rights Reserved. Key Word Parts and Definitions scler/o –sclera, white of eye, hard trop/o –turn, change tympan/o –tympanic membrane, eardrum

22. © 2015, Cengage Learning. All Rights Reserved. Questions

23. © 2015, Cengage Learning. All Rights Reserved. Question The smallest bone in the body is the stapes, or stirrup bone, of the middle ear. True or False?

24. © 2015, Cengage Learning. All Rights Reserved. Question A ringing, buzzing, or roaring sound in one or both ears is called: a.tinnitus b.labyrinthitis c.tintinitus

25. © 2015, Cengage Learning. All Rights Reserved. Question Men are how many times more likely to be color-blind than women? a.2 b.10 c.5

26. © 2015, Cengage Learning. All Rights Reserved. Question If not treated promptly, open-angle glaucoma can cause blindness in as little as 2 days. True or False?