Embryology of Pharynx Tongue and Palate Pharyngeal apparatus

The pharyngeal apparatus consists of pharyngeal arches (1, 2, 3,4, and 6), pouches (1, 2, 3, and 4), and grooves (1, 2, 3, and 4). The anatomic associations relating to these structures, in the fetus and adult, are summarized in Figures III-6-4 and III-6-5.

Table III-6-1 summarizes the relationsliips among the nerves, arteries, muscles, and skeletal elements derived from the pharyngeal arches, and Table III-6-2 shows which adult structures are derived from the various pouches.

Section Level In Figure

Mandibular Swelling and Maxillary Swelling

Clinical Correlate

Section Level In Figure

Normally, the second, third,

Mandibular Swelling and fourth pharyngeal grooves and Maxillary Swelling are obliterated by overgrowth of the second pharyngeal arch.

Failure of a deft to be completely obliterated results in a brachial cyst or lateral cervical cyst

Figure lll-6-4.The Fetal Pharyngeal Apparatus

Figure lll-6-4.The Fetal Pharyngeal Apparatus

Figure III-6-5. Section Through the Developing Pharynx

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