Oral and Craniofacial Development 2 Flashcards
what does the primary palate form from
intermaxillary segment
what do the palatal shelves form from
maxillary process
fusion of palatal shelves form the:
secondary palate
primary palate fuses with:
secondary palate
what else is forming at the same time of the palate
nasal cavity
areas of specialized thickened ectoderm develop at the surface of the embryo to form what
placodes
the tissue around the nasal placodes undergoes growth, and the placodes become submerged, forming depressions called what
nasal pits
each nasal pit invaginates and expands to form a what
nasal sac
each developing nasal cavity is initially separated from the oral cavity by the primary palate and a piece of tissue called the what
oronasal membrane
rupture of the _______________ opens up and the developing nasal cavities to the developing oral cavity
oronasal membrane
what occupies the developing nasal cavity
tongue
after rupture of the oronasal membrane, the developing tongue occupies the what
primitive nasal and oral cavities
the oral and nasal cavities become separated by the what
palate
while the palate is fusing, what else is also developing
nasal septum
the nasal septum grows down from the ___________ and fuses with the palate
roof of the nasal cavity
the nasal septum divides the nasal cavity into what
right and left sides
the mandible and maxilla are derived from neural crest cells from the ______________
first branchial arch
begins during the embryonic period and continues through childhood and adolescence
ossification
the jaw develops mostly by what
intramembranous ossification
bone tissue replaces a hyaline cartilage template of the bone-to-be
endochondral ossification
bone forms within mesenchyme without replacing a cartilage template
intramembranous ossification
the mandible develops from the _____________ of the first branchial arch
mandibular process
what is bone formation associated with
meckel’s cartilage
inferior alveolar nerve
developing teeth
muscles of mastication
formed by neural crest cells in branchial arch 1
meckel’s cartilage