Chp 17- Sense Organs Flashcards
accommodation
normal adjustment of the eye to focus on objects from far to near
anterior chamber
the area behind the cornea and in front of the lens an iris
aqueous humor
fluid produced by the ciliary body and found in anterior chamber
bioconvex
consisting of two surfaces that are rounded, elevated, and curved evenly; lens of the eye is biconvex
choroid
middle, vascular layer of the eye, between the retinal and sclera
ciliary body
structure surrounding the lens that connects the choroid and iris; controls shape of lens and secretes aqueous humor
cone
photorecpetor cell in the retina that transforms light energy into nerve impulse; responsible for colour and central vision
conjunctiva
delicate membrane that lines the undersurface of eyelids and covers anterior eyeball
cornea
fibrous transparent layer of clear tissue that extends over the anterior portion of eyeball
fovea centralis
tiny depression in the retina that is the region of clearest vision
fondus of the eye
posterior, inner part of the eye
iris
pigmented layer that opens and closes to allow more or less light into the eye
lens
transparent, biconvex body behind the pupil of the eye
macula
yellowish region on the retina lateral to and slightly below the optic disc
optic chiasm
the point at which optic nerve fibers cross in the brain
optic disc
the region at the back of the eye where the optic nerve meets the retina; blindspot
optic nerve
cranial nerve carrying impulses from the retina to the brain
pupil
central 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 on the retina
retina
light sensitive nerve cell layer of the eye containing photoreceptor cells
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
vitreous
soft jelly-like material behind the lens in the vitreous chamber
aque/o
water
blephar/o
eyelid
conjunctiv/o
conjunctiva
cor/o
pupil
corne/o
cornea
cycl/o
ciliary body
dacry/o
tears, tear ducts
ir/o
iris
irid/o
iris
kerat/o
cornea
lacrim/o
tears
ocul/o
eye
ophthalm/o
eye
opt/o
eye, vision
optic/o
eye, vision
palpebr/o
eyelid
papill/o
optic disc
phac/o
lens of the eye
phak/o
lens of the eye
pupill/o
pupil
retin/o
retina
scler/o
sclera
uve/o
uvea
vitre/o
glassy
ambly/o
dull, dim
dipl/o
double
glauc/o
gray
mi/o
small, less
mydr/o
widen, enlarge
nyct/o
night
phot/o
light
presby/o
old age
scot/o
darkness
xer/o
dry
-opia
vision
-opsia
vision
-tropia
to turn
astigmatism
defective curvature of the cornea or lens of the eye
hyperopia
farsightedness
myopia
nearsightedness
presbyopia
impairment of vision due to old age reducing lens accomodation
chalazion
small, hard, cystic mass on the eyelid; formed as a result of chronic inflammation of sebaceous gland along margin of eyelid
glaucoma
increased intraocular pressure damages the retina and optic nerve
hordeolum (stye)
staph infection of a sebaceous gland in the eyelid
macular degenreation
progressive damage to macular of the retina
nystagmus
repetitive rhythmic movements of one or both eyes
strabismus
abnormal deviation of the eye
retinal detachment
two layers of retina separate from each other
photopsia
bright flashes of light
floaters
vitreous clumps of retina
sclera buckle
belt used to buckle the retina to sclera
pnuematic retinopexy
a gas bubble injected in vitreous cavity to help reattach retina
fluorescein angiography
dye injection to examine blood flow in the retina
ophthalmoscopy
visual examination of the interior of the eye through dilated pupil
slit lamp microscopy
magnified view of expanded number of eye structures
enucleation
removal of the entire eyeball
lasik
laser to correct errors of refraction by sculpting the cornea
keratoplasty
surgical repair of the cornea
scleral buckle
suture of a silicone band to the sclera over the detached portion of retina
phacoemuslification
ultrasound to break up lens for aspiration for cataract removal
vitrectomy
removal of vitreous and replacement with a clear solution
auditory canal
channel that leads from the pinna to the eardrum
auditory meatus
auditory canal
auditory nerve fibers
carry impulses from the inner ear to the brain
auditory tube
channel between the middle ear and nasopharynx; protruding parting of external ear, or pinna
cerumen
waxy substance secreted by external ear; also called earwax
cochlea
snail-shaped, spirally wound tube in the inner ear
endolymph
fluid within the labyrinth of the inner ear
eustachian tube
auditory tube
incus
second ossicle of the middle ear
labyrinth
maze-like series of canals of the inner ear
malleus
first ossicle of the middle ear
organ of corti
sensitive auditory receptor area found in the cochlea of the inner ear
ossicle
small bone of the ear
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; eardrum
vestibule
central cavity of the labyrinth, connecting the semicircular canals and the cochlea
acous/o
hearing
audi/o
hearing
audit/o
hearing
aur/o
ear
auricul/o
ear
cochle/o
chochlea
mastoid/o
mastoid process
myring/o
eardrum, tympanic membrane
ossicul/o
ossicle
ot/o
ear
salping/o
eustachian tube
staped/o
stapes
tympan/o
eardrum, tympanic membrane
vestibul/o
vestibule
-acusis / -cusis
hearing
-meter
instrument for measure
-otia
ear condition
tinnitus
sensation of noises (ringing, buzzing, whistling, booming) in the ears
vertigo
sensation of irregular motion (whirling) from disease of inner ear or nerve carrying messages from the semicircular canals
otitis media
inflammation of middle ear
