© 2015, cengage learning. all rights reserved. special senses: the eyes and ears chapter 11

© 2015, Cengage Learning. All Rights Reserved.

Special Senses: The Eyes and EarsSpecial Senses: The Eyes and Ears

Chapter 11


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

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


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


Structures of the Eyes

• Adnexa: structures outside the eyeball– Orbit, eye muscles, eyelids, eyelashes,

conjunctiva, lacrimal apparatus

• Eyeball: also known as the globe

(continues)



(continues)

© C

enga

ge L

earn

ing



© C

enga

ge L

earn

ing


Lacrimal Apparatus

• Primary Function – Produces, stores, and removes tears

• Related Word Parts (Combining Forms)– dacryocyst/o– lacrim/o


Iris

• Primary Function – Controls the amount of light entering the eye

• Related Word Parts (Combining Forms)– ir/i, ir/o – irid/o– irit/o


Lens

• Primary Function – Focuses rays of light on the retina

• Related Word Parts (Combining Forms)– phac/o

– phak/o


Retina

• Primary Functions – 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

© C

enga

ge L

earn

ing


• Primary Function – Transmits sound waves to the middle ear

• Related Word Parts (Combining Forms)– pinn/i

Outer Ear


• Primary Function – Transmits sound waves to the inner ear

• Related Word Parts (Combining Forms)– myring/o

– tympan/o

Middle Ear


Inner Ear

• Primary Function – 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)



• myring/o – tympanic membrane, eardrum

• ophthalm/o– eye, vision

• -opia– vision condition

• opt/o– eye, vision

(continues)



• ot/o – ear, hearing

• phak/o– lens of eye

• presby/o– old age

• retin/o– retina, net

(continues)



• scler/o – sclera, white of eye, hard

• trop/o– turn, change

• tympan/o– tympanic membrane, eardrum


QuestionsQuestions


Question

The smallest bone in the body is the stapes, orstirrup bone, of the middle ear.

True or False?


Question

A ringing, buzzing, or roaring sound in one orboth ears is called:

a. tinnitus

b. labyrinthitis

c. tintinitus


Question

Men are how many times more likely to becolor-blind than women?

a. 2

b. 10

c. 5


Question

If not treated promptly, open-angle glaucomacan cause blindness in as little as 2 days.

True or False?

© 2015, cengage learning. all rights reserved. special senses: the eyes and ears chapter 11

Documents

eyes cengage learning

ears cengage learning

forms retino slide

forms labyrintho slide

eye related word parts

key word parts

retina related word

balance related word