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A&P: Chapter 13: Sensory System
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Front Back

Contains the radial muscle and Circular Muscles


Iris


Nerve that carries information from the photoreceptors to the primary visual cortex


Optic Nerve


Cranial Nerve II


Optic Nerve


Sensory Nerve For Vision


Optic Nerve


Muscle that raises the eyelid


Levator Palpebra Superioris


Location of the pimrary visual cortex


Occipital Lobe


Elevated intracranial pressure compresses this nerve to cause ptosis of the eyelid


Oculomotor Nerve


Muslce that move the eyeball in its socket


Extrinsic Eye Muscles


The Meaning of 4 in LR8SO4


Trochlear Nerve


The Meaning of 6 in LR6SO4


Abducens


The structures indicated by LR and SO in LR6SO4


Lateral Rectus and Superioir Oblique


Elevated intracranial pressure compresses this nerve to cause fixed and dialated pupils


Radial Muscle


Muscle that contracts and relaxes to change the shape of the lense


Ciliary Muscle


Contraction of this muscle widens the pupil


Radial Muscle


Contains the muscles that cause mydriasis and miosis


Circular Muscle


Includes the superior inferior medial and lateral rectus also includes the supererioir and inferior oblique.


Extinsic Eye Muscles


Muscles that allow you to look at the ceiling without moving your head


Extrinsic Eye Muscles


Anterioir extension of the sclera; this avascular structure allows light to enter the eye


Cornea


Outermost layer or Tunic of the eyeball


Sclera


Called the "window of the eye" because it is the first structure through which light enters the eye


Cornea


Colored portion of the eye


Iris


Middle tunic; has a rich supply of blood and nourishes the retina


Choroid


The shape of this structure changes in response to contraction and relaxation of the ciliary muscles; it refracts light waves


Lens


Venous sinus that drains aqueous humor


Canal of Schlemm


Contact lenses are placed on this surface


Lens


Layer that extends anterioirly to form the iliary body and the iris to form the ciliary body and the iris


Choroid


Innermost tunic; it is the nervous tissue that contains the photoreceptors


Retina


The Fluid that helps maintain the shape of the anterioir cavity


Aqueous Humor


Layer that contains the rods and cones


Retina


Circular opening in the center of the iris


Pupil


Blinde Spot


Optic Disc


Fluid that is formed by the ciliary body and drains through the canal of schlemm


Aqueous Humor


Ciliary muscles attach to these bands of connective tissue that pull on the lens


suspensory ligaments


mucous membrane that lines the inner surface of the eyelids and folds back to cover a part of the anterioir surface of the eeball


Conjunctiva


Layer that includse the macula lutea and fovea centralis


Retina


Gel Like substance that fills the posterior cavity


Vitrous Humor


Structure that secretes squeous humor and gives rise to intrinsic eye muscles called the ciliary muscles


Ciliary Body


Composed of muscles that determine the size of the pupil


Iris


Layer that sends information along the optic nerve to the occipital lobe


Retina


Gel Like fluid that gently pushes the retina against the choroid


vitreous humor


Layer that contains melanocytes to diminish glare as light enters the posterioir cavity


Choroid