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Hyoid arch
(redirected from Second branchial arch)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
(Anat.) the arch of cartilaginous or bony segments, which connects the base of the tongue with either side of the skull.

See also: Hyoid



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1) They are derived from different embryologic cell anlages: the epibranchial placode of the second branchial arch and the neural crest of the facial primordium, respectively.
In the event that the vertical segment of the ICA regresses or does not develop, a communication persists between it and the external carotid artery, which is derived from the second branchial arch.
During closure of the cervical sinus that lies between the second branchial arch and the epipericardial ridge, ectoderm may become trapped, resulting in the formation of an inclusion or cyst.
 
 
 
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