The External Ear

Question 1

• It is the sense organ of hearing and equilibrium.

Answer 1

Ear

Question 2

composed of the auricle, or pinna, and the external auditory canal

Answer 2

External ear

Question 3

• is the portion of the external ear visible without any tools.
• It is composed of a thin plate of yellow elastic cartilage covered by tight-fitting skin and is shaped with hollows, furrows, and ridges that form an irregular funnel to conduct sound waves into the external auditory canal.

Answer 3

Auricle (Pinna)

Question 4

• is S-shaped in the adult.
• Modified sweat glands in the external ear canal secrete cerumen

Answer 4

External auditory canal

Question 5

> wax-like substance that keeps the tympanic membrane soft.
has bacteriostatic properties, and its sticky consistency serves as a defense against foreign bodies

Answer 5

Cerumen