Ch. 10 Anatomic Terms Flashcards Preview

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Flashcards in Ch. 10 Anatomic Terms Deck (32):
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anterior chamber

fluid-filled space between the cornea and iris

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aqueous humor

watery liquid that fills the anterior and posterior chambers of the eye (humor = fluid)

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canal of Schlemm

duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream

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choroid

vascular layer beneath the sclera that provides nourishment to the outer portion of the retina

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ciliary body

ring of tissue behind the peripheral iris that is composed of ciliary muscle and ciliary muscle and ciliary processes

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ciliary muscle

smooth muscle portion of the ciliary body, which contracts to assist in near vision

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ciliary processes

epithelial tissue folds on the inner surface of the ciliary body that secrete aqueous humor

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conjunctiva

mucous membrane that lines the eyelids and outer surface of the eyeball

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cornea

transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract light to focus a visual image

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eyelid; palpebra

movable, protective fold that opens and closes, covering the eye

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fovea centralis

pinpoint depression in the center of the macula lutea that is the site of sharpest vision (fovea = pit)

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fundus

interior surface of the eyeball, including the retina, optic disk, macula, and posterior pole (curvature at the back of the eye) (fundus = base)

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glands of Zeis

oil glands surrounding the eyelashes

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meibomian glands

oil glands located along the rim of the eyelids

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iris

colored circle; colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil

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lacrimal gland

gland located in the upper outer region above the eyeball that secretes tears

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lacrimal ducts

tubes that carry tears to the lacrimal sac

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lacrimal sac

structure that collects tears before emptying into the nasolacrimal duct

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lens

transparent structure behind the pupil that bends and focuses light rays on the retina

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lens capsule

capsule that encloses the lens

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macula lutea; macula

central region of the retina; responsible for central vision; yellow pigment provides its color (lutea= yellow)

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nasolacrimal duct

passageway for tears from the lacrimal sac into the nose

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optic disk

exit site of the retinal nerve fibers as well as entrance point for retinal arteries and exit point for retinal veins

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optic nerve

nerve responsible for carrying impulses for the sense of sight from the retina to the brain

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posterior chamber

space between the back of the iris and the front of the vitreous chamber; filled with aqueous humor

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pupil

black, circular opening in the center of the iris through which light passes as it enters the eye

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retina

innermost layer that perceives and transmits light to the optic nerve

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cones

cone-shaped photoreceptors that respond to bright light

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rods

rod-shaped photoreceptors that respond to dim light

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sclera

tough, fibrous, white outer coat extending from the cornea to the optic nerve

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trabecular meshwork

mesh-like structure in the anterior chamber that filters the aqueous humor as it flows into the canal of Schlemm

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vitreous

jelly-like mass filling the inner chamber between the lens and retina that gives bulk to the eye

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