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Branchial arches

   Also found in: Medical, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
the bony or cartilaginous arches which support the gills on each side of the throat of fishes and amphibians. See Illustration in Appendix.

See also: Branchial



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6,7) At the fifth week of fetal development, the first and second branchial arches of the pharyngeal wall undergo a downward proliferation and meet the epicardial ridge, thereby closing the communication of the second, third, and fourth clefts with the exterior surface of the neck.
Hyoid and branchial arches [26] Anterior process of urohyal (Costa 1998a) (CI: 1.
However, in general, the branchial apparatus structures develop between the 4th and 6th week of gestation and consist of 6 pairs of mesodermal branchial arches separated by 5 paired endodermal pharyngeal pouches internally and 5 paired ectodermal branchial clefts externally.
 
 
 
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