Face and Palate Embryology Flashcards
Stromodeum
becomes mouth, junction of 5 prominences
Frontonasal, maxillary, mandibular prominences
become face
Placodes
thickened plate of ectoderm, sense organs develop around these
Nasal placodes become
nasal pits –> nostrils
Maxillary segment
fused medial nasal prominences
Nasolacrimal groove origin
develops from ectoderm
What does nasolacrimal groove become?
nasolacrimal duct
What happens is nasolacrimal groove does not open?
lots of tearing, possible eye infections
Oronasal membrane
separates oral and nasal cavity
What separates the oral and nasal cavities at 7 weeks?
primary palate
Where are olfactory receptor cells derived from?
placodes
When does the secondary palate form?
12 weeks
Muccalpharyngeal membrane
becomes separation to hard and soft palates
Choana atresia
problems breathing
Critical period of development for palate
6-9 weeks
Primary palate develops from
intermaxillary segment
Secondary palate develops from
maxillary process
Incisive foramen
location where primary and secondary palates fuse together
Cleft lip
caused by failure of fusion of maxillary prominences with fused medial nasal prominences
Cleft palate
caused by failure of fusion of the palatine shelves
Oronasal membrane ruptures to become what structure?
primitive choanae
What happens if the oronasal membrane does not rupture?
choanal atresia
Medial nasal prominences form what?
nasal septum
Olfactory epithelium arises from what?
ectoderm –> neuroectoderm
