External ear

Question 1

Where are the middle and inner ear housed?

Answer 1

The petrous part of the temporal bone

Question 2

What does the external ear consist of?

Answer 2

The auricle (pinna) and external auditory meatus

Question 3

What is the auricle made of and what is its role?

Answer 3

Made of cartilage and covered by a layer of perichondrium and skin- its role is to collect sound

Question 4

What type of cartilage is found in the pinna?

Answer 4

elastic

Question 5

What is the external auditory meatus?

Answer 5

a passageway through which sound is conducted from the auricle to the tympanic membrane

Question 6

What is the composition of the external auditory meatus?

Answer 6

outer third is cartilaginous (perichondrium and skin) inner two thirds is formed of bone covered with periosteum and skin

Question 7

What does the skin in the external auditory meatus contain?

Answer 7

Hairs and ceruminous glands (in the subcutaneous tissue)

Question 8

What do ceruminous glands do?

Answer 8

Secrete cerumen (ear wax)- along with the hairs this creates a sticky environment that traps foreign bodies