Special Senses: The Eyes and Ears

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Presentation transcript:

Special Senses: The Eyes and Ears Chapter 11

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

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

Structures of the Eyes Adnexa: structures outside the eyeball Orbit, eye muscles, eyelids, eyelashes, conjunctiva, lacrimal apparatus Eyeball: also known as the globe (continues)

Structures of the Eyes (continues)

Structures of the Eyes (continues)

Structures of the Eyes (continues)

Structures of the Eyes

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

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

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

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

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

Structures of the Ears

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

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

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

Key Word Parts and Definitions blephar/o eyelid -cusis hearing irid/o iris, colored part of eye kerat/o horny, hard, cornea (continues)

Key Word Parts and Definitions myring/o tympanic membrane, eardrum ophthalm/o eye, vision -opia vision condition opt/o (continues)

Key Word Parts and Definitions ot/o ear, hearing phak/o lens of eye presby/o old age retin/o retina, net (continues)

Key Word Parts and Definitions scler/o sclera, white of eye, hard trop/o turn, change tympan/o tympanic membrane, eardrum

Questions

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

Answer True

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

Answer a. tinnitus

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

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

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

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