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20 terms

Functions of Eye and Ear parts

AP Bio senses test
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Cornea
Thin transparent covering of the eye through which light enters. It serves as as a fixed lens that focuses light
Lens
concentrates light on a group of photoreceptors
Iris
Regulates the size of the light opening (pupil)
Pupil
Allows light to enter the eye
Retina
the light-sensitive membrane covering the back wall of the eyeball
Fovea
area consisting of a small depression in the retina containing cones and where vision is most acute
Aqueous Humor
the limpid fluid within the eyeball between the cornea and the lens
Vitreous Humor
A thick, gelatinous fluid found in the posterior segment of the eye (between the lens and the retina). The vireous humor is only produced during fetal development and helps maintain intraocular pressure (the pressure inside the eyeball).
suspensory ligaments
a fibrous membrane that holds the lens of the eye in place
ciliary muscles
muscles which relax or contract and alter the shape of the lens
choroid
middle layer of tissue in the eye that contains blood vessels that nourish the retina
optic nerve
the nerve that carries neural impulses from the eye to the brain
optic disc
the point where the optic nerve enters the retina. (blind spot)
sclera
whitish fibrous membrane (albuginea) that with the cornea forms the outer covering of the eyeball
choclea
a coiled bony fluid-filled tube in the inner ear trough which sound waves trigger nerve impulses
tympanic membrane
the membrane in the ear that vibrates to sound (eardrum)
auditory canal
the area that sound waves pass through to reach the eardrum
pinna
the external structure of the ear
oval window
fenestra that has the base of the stapes attached to it
Organ of Corti
the hearing organ of the inner ear