ch. 6 sensory sys: opthamology and otolaryngology Flashcards
brain
receives sensory information (sight, sound,
smell), processes it, and integrates it into one
experience.
Sensory organs and cells are located throughout the
body.
Eye
The major function of the eye is to provide sight. Sits in a bony socket The socket protects the eye. Is kept moist by tears Needed for proper functioning Is protected by the eyelid Helps keep the eye moist Protects eye from dust and other particles Covered by a thin, clear membrane: the conjunctiva
Ocul/o,
ophthalm/o, opt/o
eye
Lacrim/o, dacry/o
tear
-opia, -opsia
vision
Blephar/o
eyelid
Corne/o, kerat/o
cornea
Conjunctiv/o
LOOK UP
Scler/o
LOOK UP
Sclera
white part of eye
Cornea
Clear surface in the middle of the eye
Choroid layer
•Lens – bends the light rays
•Iris – colored area, controls the size of the pupil
•Ciliary muscles attach to the lens and bend it for
focusing.
Retina
•Deepest layer of the eye
•Contains cells that turn into electric signals that are
sent to the brain via the optic nerve
Vitre/o
•Vitreous liquid, jelly stuff in the eye
Cycl/o
the ciliary body– part that bends lens
Retin/o
retina
Ir/o, irid/o
iris
Phac/o, phak/o
lens
Ears
turn sound into electrical signals
Ears collect sounds.
They turn energy created from sound waves into
electrical signals.
Signals are sent to the brain which interprets the
signals into hearing.
Aur/o
Ot/o
ear
Acous/o,
audi/o
sound or hearing
-acusis
hearing condition
3 div of ear
There are three divisions of the ear: outer, middle, and
inner.
Outer ear
Pinna
Ear canal
The tympanic membrane (eardrum) separates the outer
ear from the middle ear.
The middle ear starts at the tympanic membrane.
It is a space that contains tiny bones.
Incus, malleus, and stapes
These tiny bones carry the vibrations from the tympanic
membrane to the inner ear
Cerumin/o
ear wax