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A & P Ch. 7

TermDefinition
Aqueous Humors Watery fluid filling the front and back of the eye chamber.
Vitreous Humors Watery fluid filling the front and back of the eye chamber.
Cones cells in the retina that are sensitive to bright light and provide color vision.
Conjunctiva Delicate external membrane that covers the exposed eyeball and lines the eyelid.
Cornea A transparent tissue over the anterior center of the eye.
Extrinsic Muscles Outer surface eye muscles which change the direction of viewing.
Iris Anterior portion of the choroid, give the eye its color.
Lacrimal Glands Makes tears.
Lens Transparent structure curved outward on both sides.
Optic Nerve Transmitter of visual sensory signals to the occipital lobe of the brain.
Pupil Opening where light rays enter the eye.
Retina Innermost layer of the eye which which sends impulses through the optic nerve to the brain.
Rods Sensory cells in the retina that are activated in dim light.
Sclera Tough layer of the outer eye
Suspensory Ligaments Tiny structures which attach the lens of the eye or the body.
Anvil Tiny bone in the middle ear which sends sound from the hammer to the stirrup.
Auditory Canal tube that connects the outer ear and the eardrum.
Auricle Irregularly shaped outer portion of the ear.
Cochlea Snail-shaped structure which allows you to hear.
Eustachian Tube Connects the middle ear to the pharynx and equalizes pressure on either side of the tympanic membrane.
Hammer Tiny bone which transmits sound from the tympanic membrane (eardrum) to the anvil.
Organ of Corti Spiral-shaped ridge of epithelium in the cochlear duct lined with tiny hairs which serve as hearing receptors.
Ossicles Body's three smallest bones- the hammer, anvil and stirrup
Oval Window Membrane-covered opening connecting the middle and inner ear.
Semicircular Canals Inner ear channels containing receptor hair cells that play an important rollin balance.
Stirrup Attaches anvil and oval window
Tympanic Membrane Eardum
Vestibule Chamber containing three semicircular canals
Vestibulocochlear nerve Cranial nerve comprising the cochlear nerve and the vestibular nerve.
Antihistamines Medications that curb the activity of histamines,
Gustatory Hairs Threads which emerge from the gustatory cells.
Histamines Molecules which trigger a reaction to irritation of the nasal membranes. Congestion and drainage may occur.
Mucous Layer Coating that surrounds the olfactory hairs.
Olfactory Bulb Thickened end of the olfactory nerve which sends sensory impulses to the olfactory region of the brain.
Olfactory Hairs Threads that extend from the olfactory receptor cells into the nasal cavity.
Septum Middle cartilage on nose.
Taste Buds Sensory receptors for taste.
Created by: Andrearoberts