The pharyngeal apparatus is an embryological structure.
It consists of:
*
pharyngeal groove
A pharyngeal groove (or branchial groove, or pharyngeal cleft) is made up of ectoderm unlike its counterpart the pharyngeal pouch on the endodermal side.
The first pharyngeal groove produces the external auditory meatus (ear canal). The rest (2, ...
s (from
ectoderm)
*
pharyngeal arch
The pharyngeal arches, also known as visceral arches'','' are structures seen in the embryonic development of vertebrates that are recognisable precursors for many structures. In fish, the arches are known as the branchial arches, or gill arche ...
es (from
mesoderm)
*
pharyngeal pouches (from
endoderm)
and related membranes.
References
Pharyngeal arches
Animal developmental biology
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