Anatomy of the Ear

Question 1

What are the 3 parts of the Ear?

Answer 1

1. Outer Ear.
2. Middle Ear.
3. Inner Ear.

Question 2

What are the 2 parts of the Outer Ear?

Answer 2

1. Auricle (Pinna).

2. External Acoustic Meatus (ending at the Tympanic Membrane).

Question 3

What is the Tympanic Membrane?

Answer 3

Connective tissue structure covered with skin on the outside and mucous membrane on the inside.

Question 4

What is the Middle Ear?

Answer 4

Part of the ear from the Tympanic Membrane to the Lateral Wall of the Inner Ear.

Question 5

Function of the Middle Ear.

Answer 5

Transmit vibrations from the Tympanic Membrane to the Inner Ear via auditory ossicles.

Question 6

What are the 2 parts of the Middle Ear?

Answer 6

1. Tympanic Cavity (containing Ossicles).

2. Epitympanic Recess (Superior to Tympanic Cavity next to Mastoid Air Cells).

Question 7

What are the Ossicles of the Middle Ear?

Answer 7

1. Malleus (Largest and Lateral).
2. Incus (Body attached to Head of Malleus in Epitympanic Recess and 2 Limbs).
3. Stapes (Smallest - Incus - Inner Ear.

Question 8

What is the Auditory Tube?

Answer 8

Eustachian tube - cartilaginous/bony tube connecting Middle Ear to Nasopharynx to equalise pressure of Middle Ear to External Auditory Meatus.

Question 9

Why are kids more prone to Middle Ear Infections?

Answer 9

Shorter and straighter tube in kids.