Special senses Review Terms
Terms in this set (44)
Layer of the eye that provides blood supply, pigments absorb extra light
The light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.
Dense fibrous opaque outer coat enclosing the eyeball except the part covered by the cornea
The clear tissue that covers the front of the eye
The adjustable opening in the center of the eye through which light enters.
A ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.
fluid in the eye, found between the cornea and the lens
jellylike substance found behind the lens in the posterior cavity of the eye that maintains its shape
The transparent structure behind the pupil that undergoes accommodation to help focus images on the retina.
area consisting of a small depression in the retina containing cones and where vision is most acute
Region at the back of the eye where the optic nerve meets the retina. It is the blind spot of the eye because it contains only nerve fibers, no rods or cones, and is thus insensitive to light.
the nerve that carries neural impulses from the eye to the brain
canal of Schlemm
duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream
produces the aqueous humor and changes shape of lens for focusing; up close contracts; far away relaxes
A series of fibres that hold the lens of the eye in place
Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond.
Sensory nerves in the retina of the eye having to do with color detection.
funnels sound into the external acoustic meatus
External acoustic meatus
canal sound travels down
carries messages from the inner ear to the brain
fluid-filled structures in the inner ear that are associated with the sense dynamic equilibrium
part of the inner ear that is responsible for static equilibrium
A coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
membrane at the entrance to the cochlea through which the ossicles transmit vibrations
A membrane-covered opening in the inner wall of the middle ear that compensates for changes in cochlear pressure.
first of the three auditory ossicles of the middle ear
middle of the three auditory ossicles of the middle ear
last of the three auditory ossicles of the middle ear
Connects the middle ear with the nasopharynx. Helps to equalize air pressure in the middle ear
The eardrum. A structure that separates the outer ear from the middle ear and vibrates in response to sound waves.
sense of smell
sense of taste
small bumps found on the upper surface of the tongue
sensory receptors on the tongue that identify the taste of sweet, sour, salty, bitter and umami
term for the inability to smell and discriminate odors
Delicate membrane lining the eyelids and covering the eyeball
an inflammation of the conjunctiva that is usually caused by an infection or allergy; also known as pinkeye
gland located in the upper outer region above the eyeball that secretes tears
Quick, simultaneous eye movements that change fixation from one point to another and allow us to redirect our line of sight. .
Reflexive constriction of pupils when they are exposed to bright light
position of head in motion. sensed by the semicircular canals.
the perception of the orientation of the head when the body is stationary. sensed by organs in the vestibule.
A condition in which the visual images come to a focus in front of the retina of the eye because of abnormal length of the eyeball resulting especially in defective vision of distant objects -- called also nearsightedness.
A condition in which visual images come to a focus behind the retina of the eye and vision is better for distant than for near objects -- called also farsightedness.
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