Ear

Question 1

Parts of external ear

Answer 1

1. Auricle (pinna)
2. External acoustic meatus (ear canal)
3. Cartilages

Question 2

Parts of auricle (pinna)

Answer 2

1. Marginal cutaneous sac

2. Tragus

Question 3

3 cc. of ear

Answer 3

1. Auricular c.
2. Annular c.
3. Scutiform c.

Question 4

Scutiform c. is interposed in?

Answer 4

Auricular mm.

Question 5

Parts of middle ear

Answer 5

1. Tympanic membrane (eardum)
2. Tympanic cavity
3. Petrous temporal b. (medial wall)

Question 6

Parts of petrous temporal bone

Answer 6

1. Vestibular window (oval)
2. Cochlear window (round)
3. Promontory

Question 7

Vestibular window is covered by?

Answer 7

Stapes

Question 8

Cochlear window is closed by?

Answer 8

Secondary tympanic membrane (connects to cochlear cavity)

Question 9

Which window is dorsal?

Answer 9

Vestibular window

Question 10

What is the promontory?

Answer 10

Bulge of medial wall over cochlea ventral to both windows

Question 11

3 auditory ossicles of the middle ear

Answer 11

1. Malleus (hammer)
2. Incus (anvil)
3. Stapes (stirrup)

Question 12

Parts of malleus

Answer 12

1. Manubrium attached to tympanic membrane
2. Head articulating with incus
3. Tensor tympani m.

Question 13

Stapes

Answer 13

Attaches to vestibular window, has stapedius m.

Question 14

Bony labyrinth of inner ear

Answer 14

1. Vestibule
2. Semicircular canals
3. Cochlea

→ filled with perilymph

Question 15

Membranous labyrinth of inner ear

Answer 15

1. Utricle and semicircular ducts
2. Saccule and cochlear ducts

→ filled with endolymph