Sensory Information
Vision & HearingBiology 12S. Dosman
Sclera
OOuter covering of the eye that supports and protects the eye’s inner layers; usually referred to as the white of the eye.
Cornea
OTransparent part of the sclera that protects the eye and refracts light toward the pupil of the eye.
Aqueous humour
OWatery liquid that protects the lens of the eye and supplies the cornea with nutrients.
Choroid layer
OMiddle layer of tissue in the eye that contains blood vessels and dark pigments that absorb light to stop reflection.
Iris
OOpaque disk of tissue surrounding the pupil that regulates amount of light entering the eye.
Retina
O Innermost layer of tissue at the back of the eye containing photoreceptors
Rods
OPhotoreceptors that operate in dim light to detect light in black and white
Cones
OPhotoreceptors that operate in bright light to identify colour
Fovea Centralis
OArea at the centre of the retina where cones are most dense and vision is sharpest.
Glaucoma
ODisorder of the eye caused by build up of fluid in the chamber anterior to the lens.
Cataract
OCondition that occurs when the lens or cornea becomes opaque, preventing light from passing through.
Astigmatism
OVision defect caused by abnormal curvature of the surface of the lens or cornea
Nearsightedness
OA condition that occurs when the image is focused in front of the retina
Farsightedness
OA condition that results when the image is focused behind the retina
Anatomy ReviewO http://www.youtube.com/watch?
v=RE1MvRmWg7I
Pinna
OOuter part of the ear that acts like a funnel, taking sound from a large area and channelling it into a small canal.
Auditory canal
OCarries sound waves to the eardrum
Tympanic membrane
OThin layer of tissue, also known as the eardrum
Ossicles
OTiny bones that amplify and carry sound in the middle ear.
OThey include the malleus, incus, and stapes.
Oval window
OOval-shaped hole in the vestibule of the inner ear, covered by a thin layer of tissue
Eustachian Tube
OAir-filled tube of the middle ear that equalizes pressure between the external and internal ear.
Vestibule
OChamber found at the base of the semicircular canals that provides information about static equilibrium.
Semicircular canals
OFluid-filled structures within the inner ear that provide information about dynamic equilibirum.
Cochlea
OCoiled structure of the inner ear that responds to various sound waves and converts them into nerve impulses.
Organ of Corti
OPrimary sound receptor in the cochlea
Basilar membrane
OAnchors the receptor hair cells in the organ of Corti
How the Ear WorksO http://www.youtube.com/watch?
v=PeTriGTENoc