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Ch 10: anatomical terms


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lens capsule
capsule that encloses the lens
meibomian glands
oil glands located along the rim of the eyelids
ciliary processes
epithelial tissue folds on the inner surface of the ciliary body that secrete aqueous humor
posterior chamber
space between the back of the iris and the front of the vitreous chamber filled with aqueous humor
aqueous humor
watery liquid secreted at the ciliary body that fills the anterior and posterior chambers of the eye and provides nourishment for the cornea, iris, and lens (humor = fluid)
cone-shaped cells within the retina that are color sensitive and respond to bright light
transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
lacrimal ducts
tubes that carry tears to the lacrimal sac
lacrimal sac
structure that collects tears before emptying into nasolacrimal duct
transparent structure behind the pupil that bends and focuses light rays on the retina
eyelid (palpebra)
movable protective fold that opens and closes, covering the eye
fundus (base)
interior surface of the eyebal including the retina, optic disc, macula, and posterior pole (curvature at the back of the eye)
nasolacrimal duct
passageway for tears from the lacrimal sac into the nose
rod-shaped cells within the retina that respond to dim light
canal of Schlemm
duct in anterior chamber that carries filtered aqueous humor to the veins and bloodstream
glands of Zeis
oil glands surrounding the eyelashes
trabecular meshwork
mesh-like structure in the anterior chamber that filters the aqueous humor as it flows into the canal of Schlemm
macula lutea (macula)
central region of the retina responsible for central vision; yellow pigment provides its color (lutea = yellow)
vascular layer beneath the sclera that provides nourishment to outer portion of the retina
jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye
ciliary body
ring of muscle behind the peripheral iris that controls the focusing shape of the lens
ciliary muscle
smooth muscle portion of the ciliary body, which contracts to assist in near vision capability
innermost layer that perceives and transmits light to the optic nerve
black circular opening in the center of the iris through which light passes as it enters the eye
mucous membrane that lines the eyelids and outer surface of the eyeball
anterior chamber
fluid-filled space between cornea and iris
colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil
lacrimal gland
gland located in the upper outer region above the eyeball that secretes tears
fovea centralis
pinpoint depression in the center of the macula lutea that is the site of sharpest vision (forvea = pit)
optic disc
exit site of retinal nerve fibers
tough, fibrous, white outer coat extending from the cornea to the optic nerve
optic nerve
nerve responsible for carrying impulses for the sense of sight from the retina to the brain

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