face/tongue/oral cavity Flashcards
the stomodeum is a depression between the ____ and the ____; it appears in the 3rd embryonic week
brain; pericardium
the stomodeum gives rise to the ____ and ____ cavities between the 6th and 8th embryonic week
6th; 8th
stomodeum gives rise to ____, precursor to the anterior lobe of the pituitary gland
rathke’s pouch
crown-rump measurement at 3rd embryonic week
3 mm
crown-rump measurement at 8th embryonic week (start of fetal stage)
30 mm
boundaries of the stomodeum
superior- frontal prominence
inferior- cardiac plate (swelling)
posterior- buccopharyngeal membrane
the branchial arches and clefts appear and disappear in the ____ embryonic week; arch I becomes:
4th; right and left maxillary/mandibular facial processes
the place where the upper maxillary and lower mandibular processes meet at either side of the stomodeum becomes the _____
commissura laborium oris
the ____ replace the cardiac plate as the lower boundary of the stomodeum
2 mandibular facial processes
the _____ become the posterolateral boundaries of the stomodeum
2 maxillary facial processes
____ appear within the frontal prominence; afterwards, the frontal prominence becomes what 3 facial processes?
nasal pits
median nasal facial process & right and left lateral nasal facial processes
nasal pits deepen and become ____ that open into the ____
nasal ducts; stomodeum
the nasal ducts become ____ that open into nasal cavities during formation of nasal and oral cavities
nostrils
during the 4th embryonic week, the ____ and ____ become 7 facial processes that become the face
brancial arch I; frontal prominence
the frontal prominence becomes….
median nasal process
R and L lateral nasal processes
(3 of the 7 facial processes)
paired branchial arch I becomes…
R and L maxillary facial processes
R and L mandibular facial processes
(4 of the 7 facial processes)
the median nasal process becomes:
midline of the nose
philtrum of the upper lip
the lateral nasal processes become:
lateral sides and ala of the nose
infraorbital part of the face
maxillary processes become:
upper part of the cheeks
lateral parts of the upper lip
mandibular processes become:
lower part of the cheeks
lower lip
chin
each cleft I becomes:
the external auditory meatus
each arch II becomes an embryonic fold of tissue called _____
operculum (cover)
the operculum covers:
arches III and IV; clefts II, III, and IV
the operculum becomes:
sides of the neck below the external auditory meatus
if the ____ do not merge with the ____by the 5th embryonic week, unilateral or bilateral clefting of the upper lip occurs
maxillary process or processes; median nasal process
buccopharyngeal membrane ruptures in the 4th week allowing opening to the ____ that becomes ____
foregut; nasal and oral pharynx
the buccopharyngeal membrane is the site of the ____
pillar of fauces
names of the 4 lingual swellings:
- R lateral lingual swelling
- L lateral lingual swelling
- tuberculum impar
- copula
tuberculum impar and the 2 lateral lingual swellings become:
anterior 2/3 of the tongue
copula becomes:
posterior 1/3 of the tongue or the root of the tongue
The stomodeum will begin to partition
into oral and nasal cavities in the ____ week
6th embryonic
_____ arises from the inner surface of median nasal facial process
primary palate
____ arises from the primary palate
nasal septum
____ arise from inner surface of maxillary facial processes
palatine folds
mesenchyme tissues of the ____ and ____ flow toward each other
nasal septum; palatine folds
in the 6th embryonic week, there is epithelial fusion of ____ with _____
primary palate; palatine folds
epithelial fusion progresses posteriorly, during which the epithelium of the ____ fuse with ____ and ____
palatine folds; each other; the epithelium of the nasal septum
____ and _____ occurs to form the secondary palate; oral and nasal cavities present
epithelial fusion; mesenchymal union
between 6-8 weeks IU
