Ear

Question 1

ear

Answer 1

auricle/ pinna

Question 2

3 sections

Answer 2

1. outer ear
2. middle ear
3. inner ear

Question 3

Outer Ear ( composition)

Answer 3

made of: skin and elastic cartilage
external acoustic (auditory canal) meatus extends to tympanic membrane (eardrum)
skin contains fine hairs and sebaceous glands; deeper are ceruminous glands (secrete cerumen)

Question 4

Middle Ear

Answer 4

air filled tympanic cavity, short
3 bones: collectively called the auditory ossicles
malleus, incus, and stapes

Question 5

Inner Ear

Answer 5

boney labyrinth (within porous portion temporal bone), fluid filled

3 Regions

1. Vestibule- middle portion, connects to stapes
2. Semicircular canals- posterior vestibule balance
3. Cochlea- coiled chamber and spiral organ- hearing ( sound waves are transported into nerve impulses)

CN VIII -vestibulocochlear