Ch. 7.7 Special Senses Key Terms
What is aqeuous humor?
clear, watery fluid that fills the space between the cornea and the iris
What is the conjunctiva?
mucous membrane that lines the eyelids and covers the front of the eye to provide additional protection and lubrication
What are lens?
circulated structure located behind the pupil and suspended in position by ligaments
What does refracting mean?
bends
What is the vestibule?
acts as the entrance to the two other parts of the inner ear
What is the auditory canal?
canal or tube in the ear
What is the cornea?
circular, transparent part of the front of the sclera
What is the organ of corti?
a receptor of sound waves
What is the retina?
innermost layer of the eye
What is the vitreous humor?
jellylike substance that fills the area behind the lens
What is the auricle?
visible part of the ear
What is the eustachian tube?
connects the middle ear to the pharynx
What are ossicles?
three small bones in the middle ear; the malleus, the incus, and the strapes
What is the sclera?
outermost layer of the eye and is tough connective tissue
What is the choroid coat?
middle layer of the eye that is interlaced with many blood vessels that nourish the eyes
What is the iris?
colored portion of the eye
What is the pinna?
visible part of the ear
What are the semicircular canals?
located in the inner ear; contain a liquid and delicate, hairlike cells that bend when the liquid moves with head and body movements
What is the cochlea?
contains delicate, hairlike mechanoreceptor cells, which compose the organ of corti
What are the lacrimal glands?
produce tears, which constantly moisten and cleanse the eyes
What is the pupil?
opening in the center of the iris
What is the tympanic membrane?
eardrum