12 Questions
When does the development of the face in humans begin?
Between the 4th and 6th week
Which layer is the innermost in basic embryonic development?
Endoderm
How many pairs of pharyngeal pouches are there in total?
Five
Which pharyngeal cleft gives rise to a permanent structure in the adult?
1st cleft
At what week is palate development completed?
12th week
What is the role of the 2nd pharyngeal arch related to the pharyngeal clefts?
Obliterates the clefts
At what week of gestation does tongue development begin?
4th week
Which pharyngeal arches are involved in forming the mucosa of the tongue?
1-4
What process releases the tongue from being tethered to the floor of the oral cavity?
Apoptosis
Which cranial nerves arise from the hindbrain except for the olfactory and optic nerves?
Cranial nerves 5, 7, and 8
Where do the sensory ganglia of cranial nerves originate from?
Ectodermal placodes
What structures fuse to form the secondary palate?
Palatal shelves with each other and nasal septum
Explore the basic embryonic development focusing on germ cell layers such as Endoderm, Mesoderm, and Ectoderm. Learn about the growth of mesenchymal tissue in the cranial region leading to the formation of pharyngeal arches and clefts, with emphasis on the pharyngeal clefts and their significance.
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