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Parts of Ear and Eye
parts of ear and eye
70
Biology
Undergraduate 3
10/25/2011

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Term
Palpebrae
Definition
Eyelids
Term
tarsal plates
Definition
right below the palpebrae, middle layer of the eyelid
Term
conjunctiva
Definition
pink part of the eye lid, below the tarsal plate
Term
orbicularis oculi
Definition
circular muscle around the eye
Term
optic nerve
Definition
nerve that leaves the back of the eye through the optic disc
Term
lens
Definition
behind the iris, expands and contracts to reflect light
Term
lacrimal gland
Definition
yellow pad of fat on lateral side
Term
lacrimal puncta
Definition
holes on the medial side, both top and bottom
Term
lacrimal canals
Definition
tubes within the medial side of eye
Term
lacrimal sac
Definition
large pink, located on the most superior tip of the medial side
Term
nasolacrimal duct
Definition
tissue that lines the nasolacrimal canal
Term
levator palpebrae superioris
Definition
opens the eye, attached to the upper palpebrae, innervated by the oculomotor nerve
Term
superior rectus
Definition
top, oculomotor nerve
Term
inferior rectus
Definition
bottom, oculomotor nerve
Term
medial rectus
Definition
inner side, oculomotor nerve
Term
lateral rectus
Definition
outside, abducens nerve
Term
inferior oblique
Definition
across the inferior rectus, oculomotor nerve
Term
superior oblique
Definition
across superior rectus, trochlear nerve
Term
trochlea
Definition
piece of connective tissue, superior oblique connects here
Term
Fibrous tunic
Definition
cornea and sclera
Term
cornea
Definition
outermost layer , made of stratified squamous on outside, simple squamous on inside
Term
sclera
Definition
white part of the outer eye
Term
Vascular tunic
Definition
choroid, iris and ciliary body
Term
choroid
Definition
brown layer directly beneith the sclera
Term
iris
Definition
colored part,
Term
pupillary dialators
Definition
fan out radial muscles, symathetic nervous system
Term
pupillary constrictors
Definition
circular muscles, innermost ridge, parasymathetic nervous system
Term
pupil
Definition
hole in the center of iris
Term
ciliary body
Definition
contains the ciliary muscles and processes
Term
ciliary muscles
Definition
above the processes, help to change the shape of lens
Term
ciliary processes
Definition
grovves within the muscles
Term
suspensory ligaments
Definition
attach from teh ciliary processes to the lens of the eye
Term
retina
Definition
back of the eye, where the photoreceptors are located
Term
Neural tunic
Definition
deepest, made of the retina
Term
macula lutea
Definition
larger place, has fovea centralis in the center of it
Term
fovea centralis
Definition
inside the macula lutea, highest concentration of cones
Term
optic disc
Definition
where optic nerve exits, blindspot
Term
anterior cavity
Definition
from the cornea to lens, contains aqueous humor
Term
anterior chamber
Definition
from cornea to iris, contains aqueous humor
Term
posterior chamber
Definition
from the iris to the lens, contains aqueous humor
Term
canal of schlemm
Definition
drainage point of the aqueous humor
Term
posterior cavity
Definition
everything behind the lens
Term
vitreous humor
Definition
gel like, gives the shape to the eye
Term
Pinna
Definition
outer ear
Term
external auditory canal
Definition
where the sound enters the ear
Term
tympanic membrane
Definition
"ear drum" first membrane when entering the canal
Term
auditory ossicles
Definition
the three smallest bones in the body
Term
malleus
Definition
hammer, connected to the tympanic membrane
Term
incus
Definition
connected to the malleus, anvel
Term
stapes
Definition
arch looking, covers the oval window
Term
tensor tympani
Definition
attached to the malleus, mandibular division of the trigeminal
Term
stapedius
Definition
anchors into the stapes, facial nerve
Term
atenuation
Definition
action done to prevent damage to the sterocilia by the tensor tympani and stapedius
Term
auditory tube
Definition
canal below the cochlea
Term
body labyrinth
Definition
filled by perilymph, outer bony covering
Term
semicircular canals
Definition
3 of them, contain semicircular ducts, help in dynamic equilibrium
Term
ampullae
Definition
bottom points of semicircular canals
Term
vestibule
Definition
structure at the base of the semicircular canals, vestibular branch of vestibulacochlear nerve
Term
cochlea
Definition
shell like, cochlear branch of vestibulechchlear nerve
Term
membranous labyrinth
Definition
filled with endolympth, inside the body labyrinth
Term
semicircular ducts
Definition
deep to the canals
Term
utricle
Definition
top large bump helps with the horizontal part of static equilibrium
Term
saccule
Definition
bottom large bump, helps with the verticle part of static equilibrium
Term
cochlear duct
Definition
smallest duct, filled with endolymph
Term
tympanic duct
Definition
bottom half, perilymph
Term
vestibular duct
Definition
top duct, perilymph
Term
vestibular aparature
Definition
vestibule and the semicircular canals together
Term
apex
Definition
top of the cochlea
Term
round window
Definition
blow oval window, where vibration exits
Term
oval window
Definition
stapes sits on top of it, larger then the round window
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