Ch. 7.7 Special Senses Key Terms
aqueous humor:
Clear fluid in the eye
auditory canal
Tube from the auricle to the eardrum
auricle
Outer ear part collecting sound waves, also known as the pinna
choroid coat
Middle eye layer with blood vessels
cochlea
Coiled tube in the inner ear where sound triggers nerve impulses.
conjunctiva
Transparent membrane covering the eyeball and eyelid
cornea
Transparent front part of the eye, the "window of the eye".
eustachian tube
Tube connecting middle ear and throat to equalize pressure
iris
Colored eye part controlling pupil size.
lacrimal glands
Glands above the eye producing tears.
lens
Transparent structure behind the pupil focusing light on the retina.
organ of corti
Structure in the cochlea with receptor cells for hearing.
ossicles
Three small bones in the middle ear amplifying sound
pinna
Visible outer ear, also known as the auricle.
pupil
opening in the iris center.
refracts
Bending of light rays
retina
Innermost eye layer converting light to neural signals.
sclera
Outermost, tough eye layer, the "white of the eye".
semicircular canals
Inner ear structures for balance and detecting rotational movement.
tympanic membrane
The eardrum, vibrating from sound waves.
vestibule
Inner ear part for balance and detecting linear movement
vitreous humor
Jellylike substance filling the back of the eye