To solve this worksheet, we need to match the anatomical names of the ear structures to the letters on the diagram. Let's break down the anatomy of the ear from the outside in.
1.
Outer Ear:
*
External auditory canal: This is the tube leading from the outside to the eardrum. On the diagram, the letter
L points to this canal.
*
Tympanic membrane or eardrum: This is the thin membrane that vibrates when sound hits it. It's at the end of the canal. The letter
K points to this membrane.
2.
Middle Ear:
*
Tympanic cavity: This is the air-filled space containing the small bones. The letter
J points to this general cavity area.
*
Malleus or hammer: This is the first small bone attached to the eardrum. The letter
I points to the hammer.
*
Incus or anvil: This is the middle bone, connecting the hammer to the stirrup. The letter
B points to the anvil.
*
Stapes or stirrup: This is the smallest bone, shaped like a stirrup, attached to the inner ear. The letter
C points to the stirrup.
*
Auditory or Eustachian tube: This tube connects the middle ear to the throat to equalize pressure. The letter
H points to this tube.
*
Round window: This is a membrane-covered opening that leads from the middle ear to the cochlea. The letter
G points to this window.
3.
Inner Ear:
*
Semicircular canals: These are loop-like structures responsible for balance. The letter
D points to these loops.
*
Cochlea: This is the spiral-shaped cavity responsible for hearing. The letter
F points to the snail-shell shape.
*
Cochlear nerve: This nerve carries sound information from the cochlea to the brain. The letter
E points to the nerve bundle near the cochlea.
*
Vestibular nerve: This nerve carries balance information from the semicircular canals. The letter
A points to the nerve bundle near the balance structures.
Matching the list to the letters:
*
auditory or Eustachian tube: H
*
cochlea: F
*
cochlear nerve: E
*
external auditory canal: L
*
incus or anvil: B
*
malleus or hammer: I
*
round window: G
*
semicircular canals: D
*
stapes or stirrup: C
*
tympanic cavity: J
*
tympanic membrane or eardrum: K
*
vestibular nerve: A
Final Answer:
auditory or Eustachian tube:
H
cochlea:
F
cochlear nerve:
E
external auditory canal:
L
incus or anvil:
B
malleus or hammer:
I
round window:
G
semicircular canals:
D
stapes or stirrup:
C
tympanic cavity:
J
tympanic membrane or eardrum:
K
vestibular nerve:
A
Parent Tip: Review the logic above to help your child master the concept of structure of the human ear worksheet.
