Question

u2t3: topic quiz: ear structure and function

which of these is the eustachian tube?

o d
o ad
o bd
o ae
o c
o b
o bc
o ac
o ab
o a
o be

Explanation:

🆕 New Concept Discovered: Ear Anatomy and Function
Identifying structures of the outer, middle, and inner ear.

Step 1: Understand the function of the Eustachian Tube

The Eustachian tube is a narrow channel that connects the middle ear cavity to the back of the nasopharynx (the upper part of the throat). Its primary function is to equalize air pressure on both sides of the eardrum (tympanic membrane) and to drain mucus from the middle ear.

Step 2: Locate the Eustachian Tube on the diagram

Looking at the anatomical diagram of the ear:

• A points to the pinna (outer ear).
• B points to the external auditory canal (ear canal).
• C points to the Eustachian tube, which is the canal extending downwards and inwards from the middle ear cavity (colored in red/pink) towards the throat.
• D points to the tympanic membrane (eardrum).

Therefore, the letter pointing directly to the Eustachian tube is C.

Answer:

C