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LOM 17

Sense Organs The Eye and Ear

The eye and the ear are ___________ ________ SENSE ORGANS
Receptors EYE AND EAR (sense organs)
Optic pertains to the _____ EYE
Otic pertains to the __________ EAR
Light rays enter the "central dark opening" of the eye, called __________ PUPIL
The pupil is surrounded by the "colored portion of the eye", called _______ IRIS
Membrane lining the inner surfaces of the eyelids and anterior portion of the eyeball over the white of the eye CONJUNCTIVA
What is clear and almost colorless except when blood vessels are dilated? CONJUNCTIVA
Fibrous, transparent tissue that extends like a dome over the pupil and iris CORNEA
Function of the cornea is to ___________ rays of light. BEND (REFRACT)
Normal healthy cornea has numerous blood vessels. T or F False, it is AVASCULAR
What is the "white of the eye" called? SCLERA
Fibrous layer under the conjunctiva that extends from the cornea on the anterior surface of the eyeball to the optic nerve in the back of the eye SCLERA
Dark brown membrane inside sclera is the ________ that contains many blood vessels that supply nutrients to the eye CHOROID
What contains many blood vessels that supply nutrients to the eye? CHOROID
Pigment-containing area ___________ IRIS
Has a circular opening in the center that forms the pupil IRIS
Muscles of the iris _________ the pupil in BRIGHT light and ________ the pupil in DIM light CONSTRICT DILATE
_______ of the eye is the choroid, iris and ciliary body UVEA
___________ surrounds the outside of the lens in a circular fashion. CILIARY BODY
Ciliary body will surround and encapsulate the _______ LENS
Adjustment for vision at different distances. or When lens changes its shape. ACCOMODATION
Ciliary body secretes a fluid called ______ _________ which is found in the ____ ______ of the eye. AQUEOUS HUMOR ANTERIOR CHAMBER (located in front of the eye)
__ chamber is a large region "behind" the lens. VITREOUS
Vitreous chamber is filled with a soft, jelly-like material called ____________ ___________ that maintains the shape of the eyeball. VITREOUS HUMOR (is not supposed to escape)
Thin, delicate and sensitive NERVE layer of the eye. RETINA
The retina has ________ and ____________ RODS CONES
Color vision CONES
Black and White vision and responsible for peripheral vision RODS
Where the optic nerve meets the retina is called the ____________ ____________ OPTIC DISC
Does the optic disc have light receptor cells? Y or N NO
When light rays are focused on the retina, a "chemical change" occurs in the rods and cones, initiating nerve impulses that travel from the eye to the brain via the ___________ _____________ OPTIC NERVE
A SMALL, OVAL, YELLOWISH area adjacent to the optic disc MACULA
The macula contains a central depression called the ___________ ___________ FOVEA CENTRALIS
Composed largely of CONES and is the location of the sharpest vision in the eye. FOVEA CENTRALIS
The ___________ of the eye is this POSTERIOR, INNER part that is visualized through the ophthalmoscope. FUNDUS (in back of eye)
___________ _________ of the brain is responsible for VISION. OCCIPITAL LOBE
AQUE/O water
COR/O pupil
CYCL/O ciliary body
DACRY/O tears, tear duct
KERAT/O cornea
LACRIM/O tears
OCUL/O eye
OPT/O OPTIC/O eye, vision
PALPEBR/O eyelid
PHAC/O PHAK/O lens of the eye
PAPILL/O optic disc
SCLER/O sclera (white of the eye)
VITRE/O glassy
AMBLY/O dull, dim
DIPL/O double
MI/O smaller, less
MYDR/O widen, enlarge
NYCT/O night
PHOT/O light
PRESBY/O old age
SCOT/O darkness
XER/O dry
-OPIA -OPSIA vision
-TROPIA to turn
Defective curvature of the cornea or lens of the eye, kind of shatters ASTIGMATISM
Farsightedness HYPEROPIA (hypermetropia)
Nearsightedness MYOPIA
Impairment of vision due to old age PRESBYOPIA
What part of the ear recieves sound waves? OUTER EAR
What leads from the pinna or auricle? EXTERNAL AUDITORY MEATUS (auditory canal)
Ear wax is called _______ CERUMEN
Located between outer and middle ear TYMPANIC MEMBRANE (TM)or EARDRUM
Tympanic membrane is located in the outer ear? T or F FALSE It's located BETWEEN the OUTER AND MIDDLE EAR
3 small bones that conduct sound waves through the middle ear are called? MALLEUS INCUS STAPES
1st Ossicle MALLEUS
2nd Ossicle INCUS
3rd Ossicle STAPES
Vascular layer of the eyeball that is continuous with the iris CHOROID
Contains muscles that control the shape of the lens and secretes aqueous humor CILIARY BODY
Membrane that lines the eyelid and anterior portion of the eyeball CONJUNCTIVA
Fibrous layer of clear tissue that extends over the anterior portion of the eyeball CORNEA
colored portion of the eye, surrounds pupil IRIS
Transparent body behind the iris and in front LENS
DARK CENTER of the eye through which light rays will enter PUPIL
Contains sensative cells called RODS and CONES RETINA
Tough, white outer coat of eyeball SCLERA
Jelly-like material behind the lens gives the eyeballs its shape VITREOUS HUMOR
Bending of light REFRACTION OF LIGHT
Adjustment for vision at different distances ACCOMODATION
Loss of vision due to old age PRESBYOPIA
Farsightedness HYPEROPIA
Nearsightedness MYOPIA
Cranial nerve carrying impulses from retina to brain OPTIC NERVE
Opening to inner ear OVAL WINDOW
Canal leading from middle ear to pharynx EUSTACHIAN TUBE OR AUDITORY TUBE
Circular, maze-like structure INNER EAR or LABRINTH
Cochlea contains special auditory liquids called_______________ (2) PERILYMPH ENDOLYMPH
contains sensitive auditory receptor area called _____ _ _________ ORGAN OF CORTI
Located in the brain where impulses are interpreted and heard AUDITORY NERVE FIBERS
The _____________ connects the cochlea to 3 semicircular canals for balance VESTIBULE
Semicircular canals contain 2 membranous sacs called SACCULE UTRICLE they contain endolymph fluid
Mesages are sent to ___________ in all parts of the body to ensure that equilibrium is maintained MUSCLES
What is the snail-shaped, spirally wound tube in the inner ear that contains hearing sensitive receptor cells? COCHLEA
In the cerebral cortex what is responsible for hearing? AUDITORY CENTER
Pathway of sound: ______ ______ ______ OUTER pinna MIDDLE malleus INNER cerebral cortex in the brain (auditory center)
eardrum, tympanic membrane MYRING/O TYMPAN/O
eustachian tube or auditory tube SALPING/O
stapes STAPED/O
hearing -ACUSIS -CUSIS
pupil COR/O
ciliary body CYCL/O
lens of the eye PHAK/O
white of the eye, sclera SCLER/O
glassy VITRE/O
vision -OPIA -OPSIA
to turn -TROPIA
fear -PHOBIA
Created by: kellitb