chapter 16 info Flashcards
what are the 3 layers of the eyeball
fibrous tunic
vascular tunic
sensory tunic
describe the fibrous tunic
outtermost layer
acts as protective layer
what is includes in the fibrous tunic
the sclera
cornes
conjunctiva
describe sclera function
provides shape, strength, and structure of eyeball
describe the cornea
cornea is transparent
describe the conjunctiva
outermost part of eye and surface
describe the vascular tunic
is the mid layer of eye ‘uvea’ includes the iris, choroid, and ciliary body
describe the choroid
blood supply for eye and opening allows for the optic nerve to flow through
describe the iris
a colored structure with a middle pupil
describe the ciliary body
a circular muscle that produces aqueous humor
also holds the lens and suspensory ligaments
describe the sensory tunic
inner most structure, is a double layered retina
rods vs cones
rods see dim, black vision
cones se bright colored vision
adnexa meaning
includes supporting structures superior, inferior, lateral, and medial rectus muscles
what is the ears purpose with the body
helps with hearing and equallibrium
what are the 3 major sectors of the ear
outer ear
mid ear
inner ear (labyrinth)
outer ear function
conducts sound waves through the air
mid ear function
conducts sounds waves through bones
inner ear function
conducts sounds waves through fluids
ear canal function
a tube lined with glands that produces cerumen (ear wax)
tympanic membrane function
membranous structure over the end of the ear canal
equilibrium meaning
labyrinth includes a cochlear and vestibular system which is devoted to control movement of eyes and body
