The Ear Anatomy

Question 1

What is the ear used for?

Answer 1

• to detect sound

- balance

Question 2

list the 3 layers of the ear.

Answer 2

1. outer
2. middle
3. inner

Question 3

State 3 key points regarding The Pinna (located in the outer ear).

Answer 3

1. it’s a fold
2. it can vary depending on species
3. made up of cartilage

Question 4

What does the Pinna do?

Answer 4

It directs sound down the ear canal.

Question 5

What is the ear canal lined with?

Answer 5

Lined with hairs and glands in the skin.

Question 6

What do the glands located in the ear canal produce?

Answer 6

ear wax

Question 7

The ear drum is also referred to as the….

Answer 7

Tympanic membrane.

Question 8

State at least 2 facts about the middle ear.

Answer 8

• its an air-filled pocket
• bordered by the tympanic membrane on one side and the oval window on the other.
• the malleus, incus, stapes are bones.

Question 9

Which part of the ear can the cochlea be found?

Answer 9

The inner ear.

Question 10

Fill the gaps….

The cochlea consists if an ……. and ……. shaped ……..

Answer 10

oval, round, window.

Question 11

State the key purpose of the ‘spiral shaped membrane’.

Answer 11

• picks up vibrations

- auditory ossicles.

Question 12

Fill the gaps…

Membrane on the …….. allow …….. from the stapes to …….. into the cochlea.

Answer 12

cochlea, vibrations, transmit.

Question 13

What are the key parts that help with balance and what do they do?

Answer 13

• semi-circular canals and otolith organs.

- respond to movement of the body, detects directional info.

Question 14

What are the two main things that the otolith detects?

Answer 14

• detect if the head is tilted or if upside down.