Transcription of 10. Pharyngeal Arches Revisited and the …
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10. Pharyngeal Arches Revisited and the …
10-1 Letty Moss-Salentijn DDS, PhDDr. Edwin Professor of Dentistry (in Anatomy and Cell Biology)E-mail: ASSIGNMENT: Larsen 3rd edition: ; pp. 371-378; pp. 393 bottom-398 SUMMARY:The transient structures that are known as Pharyngeal grooves and Pharyngeal pouches disappear toward theend of the embryonic period. The first Pharyngeal groove will give rise to the external auditory meatus of theadult ear. The other three grooves will disappear without having any further role in the development of Pharyngeal pouches develop into a series of structures that include the pharyngotympanic tube, middle earcavity, palatine tonsil, thymus, the four parathyroid glands, and the ultimobranchial bodies of the thyroid related development of the external ear by contributions of the first and second Pharyngeal Arches isreviewed, as is the development of the tongue, which is formed by contributions from the first throughfourth Arches .
10-3 Fig.10-1. Fate of the pharyngeal grooves. The first pharyngeal groove forms the external auditory meatus. The second pharyngeal arch expands and fuses with the cardiac eminence to cover the remaining pharyngeal grooves, which form the
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