Hearing And Equilibrium

Front 1

The Outer Ear

Back 1

pinna - collects sound waves
external ear flap - collects sound
auditory canal - carries sound to ear drum

Hint 1

Front 2

Middle Ear

Back 2

Tympanic Membrane - receives sounds vibrations (called ear drum).
Ossicles - 3 bones: malleus, incus, stapes - amplifies and carry sound.
Oval Window - receives vibrations from Ossicles and pushed inwards.
Eustachian Tube - connects middle ear to mouth and nose; air pressure equalization and drainage of fluid.

Hint 2

Front 3

Inner Ear

Back 3

Cochlea - snail shaped structure; responds to sound waves converts into nerve impulses.
Vestibule - balance and head movement (static equilibrium).
Semicircular Canals - balance and body movement.
Round window - pressure release (tiny spot on the Vestibule).

Hint 3