structures of the eye
the opening for light to enter the inner eyes
the pupil
the protective layer in the eyes that keeps the shape and support of the structure and is completely white, with no blood cells
the sclera
the outside flap of ear, that enhances sound vibrations and focuses them into the ear
the pinna
the round elastic structure that vibrates in response to soundwaves
what is the tympanum(ear drum)
the sensors in the ear for movements and balance & equilibrium
what are the semicircular canals and vestibule
the round muscle surrounding the pupil that regulates the amount of light let into the eyes
the iris
this is part of the sclera layer that bends light rays into the eye
what is the cornea
this structure in the eye carries electrochemical impulses from the eye to the occipital lobe
what is the optic nerve
connects middle ear to throat; allows pressure to equalize when there is a difference in air pressure in middle ear and outside
what is the Eustachian tube
the organ of hearing has little hair cells in it that detect sound, this organ is called
the organ of corti
the names of the two humours in the eye
what is aqueous and vitreous
the layer filled with blood vessels for nourishment and contains melanin that stops light from scattering
the choroid
the pathway of a nerve impulses in the eyes
rods/cones->bipolar cells->optic nerve cells->thalamus->occipital lobe->visual association in cerebrum
the three small bones in the middle ear where sound is passed from tympanum to the oval window
what are the ossicles
vibrations of the oval window causes the cochlea to create pressure waves in this fluid, located in the cochlea
cochlear fluid
this structure focuses light rays into the fovea centralis
what is the lens
part of the retina layer, this structure is the spot on the retina with the highest concentration of cones and rods
what is the fovea centralis
the light sensitive cells(photo-receptors) found in the retina layer and what they are sensitive to
cones- sensitive to different wavelengths of light(light)
rods-sensitive to the dim or brightness of a light
a small membrane that transmits sound vibrations to the inner ear
what is the oval window
this membrane vibrates, contains sensory mechanoreceptors that stimulate the auditory nerve
basilar membrane
this structure stretches and changes the shape of the lens in order to focus
what are the ciliary muscles
this is the inner most later of the eye and contains light sensitive cells that turn light light into an impulse
what is the retina
the mechanical energy of sound converted into an electrochemical impulses to the brain, this structure is coiled
the cochlea
the name of the three bone in the ossicles
malleus/hammer -> incus/anvil -> stapes/stirrup
the hair cells that brush against a membrane, causing the hair cells to depolarize and start an action action
sterocilia