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what are the three stages of palatal development?
primary palate formation
secondary palate formation
completion of the palate
what is the triangular mass that forms from the intermaxillary segment?
primary palate
what does the primary palate partially separate?
the nasal and oral cavities
what does primary palate formation give rise to?
anterior incisors
what are the bilateral palatal shelves that form from the maxillary processes?
secondary palate
what do the palatal shelves form from?
maxillary processes
the palatal shelves grow _____ at first then they ____ _____ and fuse together to form the _____ _____.
downward
snap upward
secondary palate
the tongue has to move from the _____ to the _____ ___ so it doesn't get in the way of the ____.
pharynx
oral cavity
snap
what does secondary palate formation give rise to?
maxillary canines, posterior teeth, soft palate and uvula
what happens in the completion of the palate?
the primary and secondary palate fuse
what are the four types of clefting that can happen with the formation of the primary and secondary palate formations?
cleft uvula
bilateral cleft of secondary palate
cleft of the primary palate
cleft of both primary and secondary palate
what is the mildest form of clefting?
cleft uvula
what clefting is it when the palatal shelves don't fuse completely in the back?
cleft uvula
what kind of clefting is it when the palatal shelves don't fuse to each other?
bilateral cleft of the secondary palate
what kind of clefting is it when the two palates don't fuse together? explain
cleft of the primary palate
complete bilateral cleft of the lip and alveolar process with bilateral cleft of the primary palate
what kind of clefting is it when nothing fuses? explain.
cleft of both primary and secondary palate
cleft of the lip and alveolar process with complete bilateral cleft of the primary and secondary palatal portions
what does the nasal septum develop from and what does it fuse with?
develops from the intermaxillary segment
fuses with the palate
what does the nasal septum divide?
divides the nasal cavity.
what causes snoring and other sinus problems?
deviated septum
where does the development of the tongue all take place?
pharynx
when does the tongue move to the oral cavity?
before the snap, must get out of the way
what branch does the body of the tongue come from?
branchial arch 1
what does the body of the tongue formation start with? and where is it located?
starts with the tuberculum impar
behind the branchial arch I
two ____ ____ ____ develop on each side of the ______ ____ forming the body of the tongue.
lateral lingual swellings
tuberculum impar
what fuse and overgrow the tuberculum impar to form the body of the tongue?
lateral lingual swellings
why do the cells degenerate on both sides of the tongue?
to free it from the floor of the mouth
true/false. the cells don't degenerate down the middle of the tongue forming the midline lingual freunum?
True
False
true
what is anklyglossia?
tongue-tied, the midline lingual frenum is too long and restricts the movement of the tongue
what arches does the bas of the tongue form from?
branchial arch 2 and 4
what forms the base of the tongue and where does it come from?
copula
branchial arch 2
what comes from branchial arch 4?
epiglottic swelling
what is the purpose of the epiglottis?
covers the trachea when you swallow so you don't drown
what is the line down the middle of the tongue? and how is it created?
median lingual sulcus
lateral lingual swellings fuse
body + base=
sulcus terminalis
the fusion of the copula is marked by?
the sulcus terminalis
where is the foramen cecum?
depression at the back of sulcus terminalis
the ____ ____ is the beginning of the _____ duct.
foramen cecum
thyroglossal duct
why is the tongue innervated by so many nerves?
because the tissue came from so many different branchial arches
Author
sweetpea281
ID
37304
Card Set
Embryology
Description
development of orofacial structures
Updated
2010-09-26T00:45:24Z
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