Upper Face Development--Placodes Flashcards
1
Q
on the outer surface of the embryo are placodes, which are rounded areas of specialized, thickened ectoderm found at the location of developing special sense organs what are the placodes in the facial area?
A
- lens placode
- otic placodes
- nasal placodes
2
Q
how do the lens placodes migrate?
A
migrate medially to give rise to the eyes
3
Q
how do the two otic placodes migrate?
A
migrate posterior and lateral to give rise to internal ear and associated tissue
4
Q
where do the two nasal placodes form?
A
they form in the anterior part of the frontal process, just superior to the stomodeum to give rise to olfactory epithelium for the sensation of smell, located in the mature nose
