pharyngeal arches


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Related to pharyngeal arches: Pharyngeal pouches

pharyngeal arches

1. obliquely disposed, rounded ridges on either side of the head and neck of human embryos during the fourth and fifth gestational weeks, which contribute to formation of the face and neck.
2. aggregate of the pharyngeal arches, pouches, grooves, and membranes seen in the developing embryo of vertebrates.

pha·ryn·ge·al arch·es

(făr-in'jē-al ahrch'ĕz)
Obliquely disposed, rounded ridges on either side of the head and neck of human embryos during fourth and fifth gestational weeks, which contribute to formation of face and neck.
References in periodicals archive ?
Notice that dorsal elements in all pharyngeal arches are deleted at lower concentrations of RA than more ventral elements.
Pharyngeal arches from fish of the size class of bull chubs that consumed Asiatic clams and the size class of bull chubs that did not ingest Asiatic clams were compared.
INTRODUCTION: Development of face, head and neck is a very balanced and co-ordinated process during which the process from pharyngeal arches fuses in midline.