face/tongue/oral cavity

Question 1

the stomodeum is a depression between the ____ and the ____; it appears in the 3rd embryonic week

Answer 1

brain; pericardium

Question 2

the stomodeum gives rise to the ____ and ____ cavities between the 6th and 8th embryonic week

Answer 2

6th; 8th

Question 3

stomodeum gives rise to ____, precursor to the anterior lobe of the pituitary gland

Answer 3

rathke’s pouch

Question 4

crown-rump measurement at 3rd embryonic week

Answer 4

3 mm

Question 5

crown-rump measurement at 8th embryonic week (start of fetal stage)

Answer 5

30 mm

Question 6

boundaries of the stomodeum

Answer 6

superior- frontal prominence
inferior- cardiac plate (swelling)
posterior- buccopharyngeal membrane

Question 7

the branchial arches and clefts appear and disappear in the ____ embryonic week; arch I becomes:

Answer 7

4th; right and left maxillary/mandibular facial processes

Question 8

the place where the upper maxillary and lower mandibular processes meet at either side of the stomodeum becomes the _____

Answer 8

commissura laborium oris

Question 9

the ____ replace the cardiac plate as the lower boundary of the stomodeum

Answer 9

2 mandibular facial processes

Question 10

the _____ become the posterolateral boundaries of the stomodeum

Answer 10

2 maxillary facial processes

Question 11

____ appear within the frontal prominence; afterwards, the frontal prominence becomes what 3 facial processes?

Answer 11

nasal pits

median nasal facial process & right and left lateral nasal facial processes

Question 12

nasal pits deepen and become ____ that open into the ____

Answer 12

nasal ducts; stomodeum

Question 13

the nasal ducts become ____ that open into nasal cavities during formation of nasal and oral cavities

Answer 13

nostrils

Question 14

during the 4th embryonic week, the ____ and ____ become 7 facial processes that become the face

Answer 14

brancial arch I; frontal prominence

Question 15

the frontal prominence becomes….

Answer 15

median nasal process
R and L lateral nasal processes
(3 of the 7 facial processes)

Question 16

paired branchial arch I becomes…

Answer 16

R and L maxillary facial processes
R and L mandibular facial processes
(4 of the 7 facial processes)

Question 17

the median nasal process becomes:

Answer 17

midline of the nose

philtrum of the upper lip

Question 18

the lateral nasal processes become:

Answer 18

lateral sides and ala of the nose

infraorbital part of the face

Question 19

maxillary processes become:

Answer 19

upper part of the cheeks

lateral parts of the upper lip

Question 20

mandibular processes become:

Answer 20

lower part of the cheeks
lower lip
chin

Question 21

each cleft I becomes:

Answer 21

the external auditory meatus

Question 22

each arch II becomes an embryonic fold of tissue called _____

Answer 22

operculum (cover)

Question 23

the operculum covers:

Answer 23

arches III and IV; clefts II, III, and IV

Question 24

the operculum becomes:

Answer 24

sides of the neck below the external auditory meatus

Question 25

if the ____ do not merge with the ____by the 5th embryonic week, unilateral or bilateral clefting of the upper lip occurs

Answer 25

maxillary process or processes; median nasal process

Question 26

buccopharyngeal membrane ruptures in the 4th week allowing opening to the ____ that becomes ____

Answer 26

foregut; nasal and oral pharynx

Question 27

the buccopharyngeal membrane is the site of the ____

Answer 27

pillar of fauces

Question 28

names of the 4 lingual swellings:

Answer 28

1. R lateral lingual swelling
2. L lateral lingual swelling
3. tuberculum impar
4. copula

Question 29

tuberculum impar and the 2 lateral lingual swellings become:

Answer 29

anterior 2/3 of the tongue

Question 30

copula becomes:

Answer 30

posterior 1/3 of the tongue or the root of the tongue

Question 31

The stomodeum will begin to partition

into oral and nasal cavities in the ____ week

Answer 31

6th embryonic

Question 32

_____ arises from the inner surface of median nasal facial process

Answer 32

primary palate

Question 33

____ arises from the primary palate

Answer 33

nasal septum

Question 34

____ arise from inner surface of maxillary facial processes

Answer 34

palatine folds

Question 35

mesenchyme tissues of the ____ and ____ flow toward each other

Answer 35

nasal septum; palatine folds

Question 36

in the 6th embryonic week, there is epithelial fusion of ____ with _____

Answer 36

primary palate; palatine folds

Question 37

epithelial fusion progresses posteriorly, during which the epithelium of the ____ fuse with ____ and ____

Answer 37

palatine folds; each other; the epithelium of the nasal septum

Question 38

____ and _____ occurs to form the secondary palate; oral and nasal cavities present

Answer 38

epithelial fusion; mesenchymal union

between 6-8 weeks IU