Ch. 7.7 Special Senses Key Terms
A watery fluid that fills the space between the cornea and iris. It helps maintain the forward curvature of the eyeball and refracts light rays.
Aqueous Humor
A mucous membrane that covers the eyelids and the front of the eye to provide additional protection and lubrication.
Conjunctiva
Lens
A circular structure located behind the pupil. It refracts (bends) light rays so the rays focus on the retina.
Refracts
The process of bending light rays (done by the cornea and lens) so that the rays focus on the retina.
Vestible
The first section of the inner ear, containing liquid and hairlike cells that help maintain equilibrium.
A canal, or tube, that collects sound waves and connects the external ear to the tympanic membrane (labeled as External auditory canal in diagrams).
Auditory canal
A circular, transparent part of the front of the sclera. It allows light rays to enter the eye.
Cornea
Organ of Corti
A receptor of sound waves located in the cochlea. It transmits the impulses from sound waves to the auditory nerve.
Retina
The innermost layer of the eye. It is made of many layers of nerve cells, which transmit light impulses to the optic nerve.
A jellylike substance that fills the area behind the lens. It helps maintain the shape of the eyeball and also refracts light rays.
Vitreous Humor
The visible part of the ear, which is an elastic cartilage flap covered by skin (also called the pinna).
Auricle
A tube that connects the middle ear to the pharynx, or throat. It allows air to enter the middle ear and helps equalize air pressure on both sides of the tympanic membrane.
Eustachian
Ossicles
The three small bones in the middle ear (malleus, incus, and stapes). They transmit sound waves from the tympanic membrane to the inner ear.
Sclera
The outermost layer of the eye, often called the "white" of the eye.
Spell the teacher's name
Sianturi
The middle layer of the eye; it is interlaced with many blood vessels that nourish the eyes.
Choroid coat
The colored portion of the eye. It contains two muscles, which control the size of the pupil and regulate the amount of light entering the eye.
Iris
Pinna
The visible part of the ear, which is an elastic cartilage flap covered by skin (also called the auricle).
Semicircular canals
Located in the inner ear, they contain a liquid and hairlike cells that help maintain our sense of balance and equilibrium.
What is the bone in the knee?
Patella
Contains the organ of Corti, which is a receptor of sound waves. It carries the impulses from sound waves to the auditory nerve.
Cochlea
Glands in the eye that produce tears, which constantly moisten and cleanse the eye.
Lacrimal Glands
Pupil
The opening in the center of the iris.
Tympanic membrane
Also called the eardrum, it separates the outer ear from the middle ear and vibrates when sound waves hit it.
What is contained in the skull's bones?
Cranium, and Facial bones