special senses eye
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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| three layers (tunics) of the eye | show 🗑
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| outermost layer of the eyeball: | show 🗑
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| show | serves as protective coat for the more sensitive structures beneath.
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| fibrous tunic is comprised of: | show 🗑
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| the sclera or "white of the eye" provides: | show 🗑
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| show | the cornea
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| show | light to enter the interior of the eye.
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| the cornea does not contain capillaries. It relies on __________ for nourishment | show 🗑
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| show | conjunctiva
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| the middle layer of the eyeball is called the _________ or ___________ | show 🗑
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| show | choroid, iris, and ciliary body
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| the _________ provides the blood supply for the entire eye. | show 🗑
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| the choroid contains pigmented cells that: | show 🗑
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| An opening in the choroid allows: | show 🗑
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| show | iris and ciliary body
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| The iris is: | show 🗑
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| the perforated center of the iris is called: | show 🗑
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| The iris regulates: | show 🗑
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| show | constricts, dilates
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| show | ciliary body
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| show | a capsular bag that holds the lens between the suspensory ligaments
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| As the ________ ___________ contracts and relxes, it alters the shape of the lens making it thicker or thinner | show 🗑
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| changes in the shape of the lens allow the eye to focus on an image | show 🗑
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| show | sensory tunic
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| show | delicate, double-layered retina
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| show | thin, outer pigmented layer lying over the choroid and a thick, inner nervous layer (visual portion)
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| show | reception and transmission of visual impulses to the brain
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| retina has two types of visual receptors: | show 🗑
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| show | rods
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| show | cones
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| in the central portion of the reina is a highly sensitive structure called the: | show 🗑
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| show | fovea
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| show | fovea
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| show | cones
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| show | photopigment or visual pigment
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| show | a chemical change that stimulates rods and cones
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| show | optic nerve / brain
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| show | optic disk
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| show | blind spot
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| this fluid (humor) is found in the posterior chamber and anterior chamber of the anterior segment and provides nourishment for the lens and the cornea. | show 🗑
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| show | ciliary body
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| small opening that allows drainage of aqueous humor from the eye | show 🗑
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| if aqueous humor fails to drain from the eye at the rate it is produced, a condition called _________ results. | show 🗑
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| a jellylike substance that fills the interior of the eye (vitreous chamber) | show 🗑
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| show | vitreous humor, lens, & aqueous humor
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| show | all supporting structures of the eye globe
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| show | extraocular muscles
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| the 6 extraocular muscles control: | show 🗑
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| show | lacrimal glands
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| produce tears that bathe and lubricate the eyes: | show 🗑
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| show | canthi (singular, canthus); lacrimal glands; nasal cavity
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