Oral and Nasal Cavity Development Flashcards
Where can facial clefts occur?
Between any boundary of prominences.
Describe the formation of the nasal sac? What kind of cells is it made of?
Nasal placode lateral edges bulge outward, creating the nasal pit. Lateral edges move medially forming the nasal sac.
Ectoderm.
What is between the nasal sac and stomodeum as they invaginate?
the oronassal membrane.
How are the sinuses formed?
Through diverticulations of the nasal cavity.
Nasal canal is lined with what?
Psedostratified columnar epithelium with cilia, Goblet cells, Lamina propria.
How is the mandible formed?
Meckels cartilage forms and signals mesenchyme surrounding it to ossify into the mandible.
What fuses to form the intermaxillary segment? What does this segment form?
Median nasal process. Forms the Primary palate.
What forms the lateral palatal processes? What doe these process form?
The maxillary process. Forms the Secondary palate.
The Soft palate is made up of what? Hard palate?
Soft: Made Entirely of part of the secondary palate.
Hard: Made up of all the primary palate and some of the secondary palate.
How does the nasal septum form?
It grows downwards encountering the primary and secondary palates.
The tongue is made from which arches?
1 and 3
The anterior 2/3 of the tongue is made from the fusion of what? Made from what type of layer?
Lateral lingual swellings and the tuberculum inpar. Made from ectoderm.
The posterior 1/3 of the tongue is made from what? What type of layer?
The copula/hypobranchial eminence. Endoderm.
The anterior 2/3 of the tongue muscle is made from what? Posterior 1/3?
Anterior: Occipital somites
Posterior: Extrinsic mesoderm.
What kind of epithelium is the ventral surface of the tongue made of?
Lining mucosa, non-keratinized stratified squamous epithelium.
