Chapter 07 Key Terms
The thin, watery fluid in the front part of the eye.
Aqueous humor
The thin, clear membrane that covers the white part of your eye and lines your eyelids.
conjunctiva
The clear part inside the eye (behind the iris) that changes shape to focus light.
Lens
(An action) To bend light. The cornea and lens do this.
Refracts
A chamber in the inner ear that connects the cochlea and semicircular canals and helps with balance.
Vestibule
The tube that leads from the outside of the ear to the eardrum (also called the ear canal).
Auditory canal
The clear, dome-shaped outer layer at the very front of the eye that helps focus light.
Cornea
The group of tiny hair cells inside the cochlea that are the true hearing organ.
Organ of Corti
The light-sensitive layer at the very back of the eye that sends images to the brain (like camera film)
Retina
The clear, jelly-like substance that fills the main part of the eyeball and gives it shape.
Vitreous humor
The visible, fleshy part of the ear on the outside of your head that helps collect sound.
Auricle
The small tube that connects the middle ear to the back of your throat to equalize pressure
Eustachian tube
The three tiniest bones in the body (in the middle ear) that pass sound vibrations.
Ossicles
The tough, white outer layer of the eyeball.
Sclera
The middle layer of the eye with blood vessels that feed the eye.
Choroid coat
The colored part of your eye (blue, brown, etc.) that controls the size of the pupil.
Iris
Another name for the auricle (the visible outer ear).
Pinna
Three tiny, fluid-filled loops in the inner ear that control your sense of balance.
Semicircular canals
The spiral-shaped (like a snail shell) part of the inner ear that turns vibrations into sound signals for the brain
Cochlea
The glands that produce tears.
Lacrimal glands
The black hole in the center of the iris that lets light in.
Pupil
The eardrum. A thin piece of skin that vibrates when sound hits it.
Tympanic membrane