Anatomy Special Senses

Terms in this set (50)

Aqueous humor - clear fluid filling the area between the lens and the cornea, composed mostly of water;
helps maintain the shape of the eyeball.
Blind spot - area of the retina where the receptor cells converge to form the optic nerve.
Choroid - thin, dark sheet of tissue between the retina and the sclera.
Cones - receptor cells of the retina that are responsible for perceiving color.
Cornea - transparent covering that allows light to enter the eye; on a preserved specimen, the cornea is cloudy.
Hyaloid fossa - indention in the center of the vitreous body that supports the lens.
Iris - diaphragm that regulates the size of the pupil.
Lens - biconvex transparent structure that focuses the light coming in through the cornea and pupil.
Optic nerve - bundle of nerve cells that send signals from the eye to the brain.
Pupil - opening through which light enters the eye.
Retina - light-sensitive portion of the eye composed of receptor cells called cones and rods.
Rods - receptor cells of the retina that are responsible for perceiving difference in light intensity.
Sclera - outer covering of the eyeball; a tough, opaque sheet of connective tissue that protects inner
structures of the eyeball and helps maintain rigidity.
Tapetum - iridescent portion of the choroid tissue.
Vitreous body - the cavity between the retina and the back of the lens.
Vitreous humor - viscous fluid that fills the vitreous body; helps maintain the shape of the eyeball.
Zonula ciliaris - ligaments that suspend the lens and stretch it to focus vision.
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