Ch. 7.7 Special Senses
aqueous humor
a clear, watery fluid that fills the space between the cornea and iris.
conjunctiva
A mucous membrane,
lens
circular structure located behind the pupil and suspended in position by ligaments.
retina
The innermost layer of the eye
vitreous humor
the jellylike substance that fills the area behind the lens.
auditory canal
the external auditory meatus
cornea
a circular, transparent part of the front of the sclera.
organ of corti
a receptor of sound waves.
sclera
The outermost layer is the tough connective tissue
auricle
The outer ear contains the visible part of the ear
eustachian tube
allows air to enter the middle ear and helps equalize air pressure on both sides of the tympanic membrane.
ossicles
three small bones; the malleus, the incus, and the stapes.
semicircular canals
located in the inner ear
choroid coat
The middle layer of the eye
iris
the colored portion of the eye
pinna
The outer ear contains the visible part of the ear,
tympanic membrane
Sound waves travel through the auditory canal until they reach the
cochlea
shaped like a snail's shell, contains delicate, hairlike mechanoreceptor cells, which compose the organ of Corti, a receptor of sound waves.
lacrimal glands
constantly moisten and cleanse the eye.
refracts
bends
vestibule
which acts as the entrance to the two other parts of the inner ear