Ear Flashcards Preview

Grade 12 LS 2016 > Ear > Flashcards

Flashcards in Ear Deck (10):
1

Pinna

Collects and directs sound waves into external auditory opening

2

External auditory canal

Transmits sound waves from the pinna to the tympanic membrane

3

Tympanic membrane

•Thin membrane covering opening between external auditory canal and middle ear
•Converts sound waves to vibrations that are transmitted to the hammer

4

Ossicles

•3 ossicles form leaver system connecting outer and inner ear
•Amplifies and transmits the vibration to oval window membrane

5

Oval window

Transmits vibration from air-filled middle ear to fluid-filled inner ear
•opening covered with thin membrane connecting middle and inner ear

6

Round window


•opening covered with thin membrane connecting middle and inner ear
•below oval window

7

Eustachian tube

•connects middle ear to pharynx
•ensures equal air pressure on either side if tympanic membrane

8

Vestibular apparatus

•2 membranous sacks and 3 semicircular canals
•helps maintain balance in the body

9

Cochlea

Long coiled tube

10

Auditory nerve

Nerve impulses to cerebral cortex (hearing) and cerebellum (balance)