Ch. 11 Special Senses Flashcards
adnexa of the eyes (6)
the structures outside the eyeball, including the orbit, eye muscles, eyelids, eyelashes, conjunctiva, and lacrimal apparatus
adnexa
appendages or accessory structures of an organ
orbit
eye socket
binocular vison
both eyes working together
canthus
the angle where the upper and lower eyelids meet
tarsus
the framework within the upper and lower eyelids that provides the necessary stiffness and shape
cilia
small hairs, in this case the eyelashes
conjunctiva
the transparent mucous membrane that lines the underside of each eyelid and continues to form a protective covering over the exposed surface of the eyeball
lacrimal apparatus
the structures that produce, store, and remove tears
lacrimal glands
secrete lacrimal fluid (tears), located on the underside of the upper eyelid, just above the outer corner of each eye
lacrimal fluid
tears, maintain moisture on the anterior surface of the eyeball, blinking distributes
lacrimal canal
duct at the inner corner of each eye, which collect tears and empty them into the lacrimal sacs
lacrimal sac
enlargement of the upper portion of the lacrimal duct
lacrimal duct
passageway that drains excess tears into the nose
optic
pertaining to eye or sight
ocular
pertaining to the eye
extraocular
outside the eyeball
intraocular
within the eyeball
sclera
white of the eye, maintains the shape of the eye and protects the delicate inner layers of tissue, tough, fibrous tissue
choroid
opaque middle layer of the eyeball that contains many blood vessels and provides blood supply for the entire eye
retina
the sensitive innermost layer that lines the posterior segment of the eye, receives nerve impulses and transmits them to the brain via the optic nerve
trabecular meshwork and canal of Schlemm
constantly filters and drains aqueous fluid, which maintains the pressure of the eye
intraocular pressure (IOP)
measurement of the fluid pressure inside the eye
vitreous gel
soft, clear, jelly-like mass that contains millions of fine fibers