Sense Organs: The Eye And The Ear Vocabulary, Chapter 17

Chapter 17, Sense Organs Vocabulary, Language Of Medicine, 8th Edition
 
Created Dec 27, 2009
by marysummer
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Side ASide B
accommodation
Normal adjustment of the eye to focus on objects from far to near.
anterior chamber
Area behind the cornea and in front of the lens and iris.
aqueous humor
Fluid produced by the cilary body and found in the anterior chamber.
biconvex
Having two sides that are rounded, elevated and curved evenly, like part of a sphere.
choriod
Middle, vascular layer of the eye, between the retina and the sclera.
ciliary body
Structure on each side the lens that connects the choroid and iris.
cone
Photoreceptor cell in the retina that transforms light energy into a nerve impulse.
conjunctiva
Delicate membrane lining the eyelids and covering the anterior eyeball.
cornea
Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball.
fovea centralis
Tiny pit or depression in the retina that is the region of clearest vision.
fundus of the eye
Posterior, inner part of the eye.
iris
Colored pigmented membrane surrounding the pupil of the eye.
lens
Transparent, biconvex body behind the pupil of the eye. 
macula
Yellowish region on the retina laterial to and slightly below the optic disc; contains the...
optic chiasm
Point at which optic nerve fibers cross in the brain.
optic disc
Region at the back of the eye where the optic nerve meets the retina.
optic nerve
Cranial nerve carrying impulses from the retina to the brain (cerebral cortex).
pupil
Dark opening of the eye, surrounded by the iris, through which light rays pass.
refraction
Bending of light rays by the cornea, lens and fluids of the eye to bring the rays into focus...
retina
Light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods and cones).
rod
Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision.
sclera
Tough, white outer coat of the eyeball.
thalamus
Relay center of the brain.  Optic nerve fibers pass through the thalamus on their way...
vitreous humor
Soft, jelly-like material behind the lens in the vitreous chamber, helps maintain the shape...
auditory canal
Channel that leads from the pinna to the eardum.
auditory meatus
Auditory canal.
auditory nerve fibers
Carry impulses from the inner ear to the brain (cerebral cortex). 
auditory tube
Channel between the middle ear and the nasopharynx; eustachian tube.
auricle
Flap of the ear; the protuding part of the external ear, or pinna.
cerumen
Waxy substance secreted by the external ear; also called ear wax.
cochlea
Snail-shaped, spirally wound tube in the inner ear, contains hearing-sensitive receptor cells.
endolymph
Fluid within the labyrinth of the inner ear.
eustachian tube
Auditory tube.
incus
Second ossicle (bone) of the middle ear, incus means anvil.
labyrinth
Maze-like series of canals of the inner ear. 
malleus
First ossicle of the middle ear, malleus means hammer.
organ of Corti
Sensitive auditory receptor area found in the cochlea of the inner ear.
ossicle
Small bone of the ear, includes the malleus, incus and stapes.
oval window
Membrane between the middle ear and the inner ear.
perilymph
Fluid contained in the labyrinth of the inner ear.
pinna
Auricle; flap of the ear.
semicircular canals
Passages in the inner ear associated with maintaining equilibrium.
stapes
Third ossicle of the middle ear.
tympanic membrane
Membrane between the outer and the middle ear, also caled the eardrum.
vestibule
Central cavity of the labyrinth, connecting the semicircular canals and the cochlea.


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