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branchial arch

   Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia 0.01 sec.
branchial arch [′braŋ·kē·əl ′ärch]
(vertebrate zoology)
One of the series of paired arches on the sides of the pharynx which support the gills in fishes and amphibians.


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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.
A fistulous tract occurs when the branchial arch does not completely fuse with the epicardial ridge, resulting in an internal breakdown.
 
 
 
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