Eye structure
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Lateral Rectus | Muscle that turns the eyeball outward.
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| Retina | Contains visual receptor cells (photoreceptors). Senses light and creates impulses sent through the optic nerve.
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| Choroid Coat | Blood vessels found here for nourishment. Help keep the inside of the eye dark.
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| Sclera | White portion of the eye. Protects the eye and is an attachment for the extrinsic muscles.
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| Vitreous humor | Jelly-like fluid filling the central cavity of the eye.
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| Fovea centralis | Region of the retina that produces the sharpest vision.
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| Optic Nerve | Pierce's the Sclera, carrying messages to and from the eye.
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| Optic disc | Nerve fibers from retina leave the eye and become part of the optic nerve. Artery and vein pass through here.
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| Posterior cavity | Space enclosed by the lens, ciliary body, and retina filled with vitreous humor.
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| Medial rectus | Muscle that functions in bringing the pupil closer to the midline of the body.
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| Ciliary body | Forms internal ring around the eye, and secrets aqueous humor.
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| Suspensory ligaments | Connect ciliary body to the eye's lens.
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| Iris | Colored part of eye that regulates the amount of light entering the eye. When bright light, closes the pupil to let in less light and vice versa.
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| Lens | Behind iris and pupil, composed of specialized epithelial cells. Foucuses light rays into the retina.
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| Pupil | Circular opening in the center of the iris. Changes size to adjust to the amount of light.
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| Cornea | Window of the eye that helps focus entering light rays. Few cells and no blood vessels.
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| Aqueous humor | Watery fluid filling the space between the cornea and lens, providing nutrients and maintaining the shape of the front of the eye.
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| Anterior chamber | Found between cornea and iris.
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| Posterior chamber | Found between the iris and vitreous humor, occupied by the lens.
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Created by:
johncl
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