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What groove in the upper lip and middle of the nose seperates the nostrils
Philtrum
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What divides the nasal cavity sagittally into equal halves?
(Median) Nasal Septum
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What opens at the junction btw the skin and MM, at base of alar fold just inside the nostril (nasal vestibule)
Nasolacrimal duct
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What passages are formed by the nasal conchae and nasal septum
Nasal Meatus
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What is the largest meatus located btw the ventral nasal conchea and the hard palate?
Ventral Nasal Meatus
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What is the largest laryngeal cartilage that is opened dorsally
Thyroid Catrilage
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What are the paired, irregular, pyramid shaped cartilages hanging from the rostrodorsal edge of the cricoid cartilage
Arytenoid cartilage
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List 3 processes of the arytenoid cartilage in the dog
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What does the pull of the cricoarytenoideus dorsalis m on the muscular part proceess of the arytenoid cartilage do?
Swings vocal process and vocal cords laterally, thus opening the glottic cleft
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What is the only laryngeal muscle which opens the glottic cleft
Cricoarytenoideus dorsalis
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What is the innervation of cricoarytenoideus dorsalis
Recurrent Laryngeal (specifically: caudal laryngeal nerve)
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What is the bow tie muscle
Cricothyroideus m
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What is the narrowest part of the laryngeal cavity
Glottic Cleft
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What is the anatomical term for the eyelids?
Palpebrae
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List the parts of the conjunctiva
- Palpebral and bulbar conjunctiva
- Seperated by the
- conjunctival fornix
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What happens when the eyeball is retracted
The 3rd Eyelid crosses the eye to protect it
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What is the 3rd eyelid
Folds covering a "T"-shaped cartilage in the medial commissure
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What is the gland of the third eyelid?
Accessory Lacrimal gland surrounding the cartilage of the thrid eyelid
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What are the 3 tunis of the eyeball from inside to out?
- Fibrous
- Vascular
- Nervous tunic
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What are the two compartments of the fibrous tunic?
Corneal and Sclera
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What is the connection btw the cornea and sclera
Corneoscleral junction (limbus)
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What are the 3 compartments of the uvea (vascular tunic)?
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How is the size of the pupil controlled?
Dilator and sphincter mm of the iris
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What is the specialized area of the choroid which reflects light back into the eyeball increasing vision in low light (night vision)
Tapetal area (tapetum lucidum)
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What is the term for dilation and constriction of the pupil?
- Mydriasis (large word=large pupil)
- Miosis (small word=small pupil)
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What is the blind spot of the eye?
optic disc (where optic nerve fibers leave the eye)
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Where is the tapetum lucidum located?
Superiolateral to optic disc
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Excluding the optic nerve, which nerve is sensory from the eyeball?
Opthalmic branch (trigeminal, CN5)
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What are the 3 spaces of hte eyeball and their locations
- Anterior chamber (btw. cornea and iris)
- Posterior chamber (btw. iris and lense)
- Vitreous chamber (behind lense)
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What moves the eyeball?
Extrinsic muscles of the eyeball
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What innervates the lateral recuts and thus abducts the eye?
Abducens (CrN6)
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What is the formula for the innervation of the extrinsic eye muscles?
Do4(LrRb)6Rest3
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What innervated the orbicularis oculi m?
Facial Nerve
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