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Anatomy and Physiology 101Lab 13
Ear and Eye AnatomyLab Exercise and Report 32Lab Exercise and Report 34
Textbook figures 12.9-.10 and 12.22-.26, .30
The objective for this lab is to learn the anatomy of the eye and the ear using the models and diagrams.
Anatomy of the Ear
External earAuricleExternal auditory canal (meatus)
Middle earTympanic cavity (space that contains the middle ear structures)Tympanic membraneMiddle Ear Ossicles
MalleusIncusStapes
Eustachian (auditory) tube
Inner earOval window (shown on models connected to stapes)VestibuleSemicircular canalsCochlea
Round windowVestibulocochlear (auditory) nerve- cranial nerve VIII
Anatomy of the Eye Eyelid (palpebrae)Lacrimal apparatus
Lacrimal glandLacrimal sac
Muscles associated with the eyeOrbicularis oculi- surrounds eyeLevator palpebrae superioris- muscle in upper eyelid
Extrinsic eye muscles- allow for voluntary eye movement, controlled by cranial nerves III, IV, VI
Superior rectus- rolls eye upInferior rectus- rolls eye downLateral rectus-rolls eye outwardMedial rectus- rolls eye inwardSuperior oblique-rolls eye downInferior oblique- rolls eye up
Outer tunic (layer)Sclera- whiteCornea- transparent
Middle tunic (layer)Choroid coat- darkCiliary body with ciliary musclesSuspensory ligamentsLens- transparentIris- color variesPupil- hole in iris, allows light waves to reach retina, size of pupil is determined by iris
Inner tunic (layer)Retina- contains the photoreceptors called rods and cones; rods detect light and dark while cones detect color
Optic disk (blind spot)Fovea centralis (focal point)
Cavities within the eyeAnterior cavity-located in front of the lens and contains aqueous humor
Anterior chamber- between cornea and iris. Drains the aqueous humor (via canal of Schlemm)
Posterior chamber- between iris and lens. Produces the aqueous humor (via ciliary processes).
Posterior cavity- located between the lens and the retina, contains vitreous humor
Optic nerve- cranial nerve II
Students who are interested may also perform the sheep eye dissection as described in the lab manual.
Complete Lab Reports 32 and 34
auricle
external acoustic meatus
tympanic membrane
LAB 13: Ear and Eye anatomy
Activity 1. Identify the Parts of the Ear
semicircular canals
tympanic membrane
incus
vestibulocochlear nerve
cochlea
vestibule
malleus
stapes
lacrimal gland
tympanic membrane
Round window (not visible from this angleActivity 2. Identify the parts of the Eye
2a. Lacrimal Apparatus
lacrimal canaliculi
puncta
lacrimal sac
nasolacrimal duct
cochlea
semicircular canals
vestibule
oval window (stapes removed)
lacrimal canal
Extrinsic Eye Muscles
superior oblique
lateral rectus
superior rectus
levator palpebrae superioris
inferior rectus
inferior oblique
medial rectus
levator palpebrae superioris
medial rectus
superior oblique
inferior rectusinferior oblique
superior rectus (cut)
lateral rectus (cut)
Outer layer of Eye
Middle layer of Eye
sclera
Cornea
choroid coat
iris
pupil
ciliary muscle
lens
ciliary body(dark red)
suspensory ligaments (white lines)
Inner Layer of Eye
Spaces within the Eye
optic nerve
retina
optic disc
fovea centralis
posterior cavity
anterior chamber
posterior chamber
anterior cavity
iris
vitreous humor
optic disc
macula
lens