pharyngeal arch


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Related to pharyngeal arch: pharyngeal pouch, second pharyngeal arch

pharyngeal arch

n.
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References in periodicals archive ?
The mandible is the first pharyngeal arch which is formed from primordium through migrating the neural crest cells which appear in the duration of the fourth week of gestation.
Spatiotemporally separated cardiac neural crest subpopulations that target the outflow tract septum and pharyngeal arch arteries.
During the fourth to eighth intrauterine weeks, the anterior portion of the tongue is formed by the two lateral lingual swellings and one medial swelling; "the tuberculum impar." All of these are derivatives of the first pharyngeal arch. The appearance of a second medial swelling known as the "Copula or hypobranchial eminence" follows.
When the team checked the hearts of the embryos, they found the glowing red cells in the second pharyngeal arch, which is known for forming parts of the neck and face.
Goldschmidt and Jacobsen have reported a new family syndrome that affects the first pharyngeal arch structures and mammary line (6).
Every pharyngeal arch has a core of cartilage derived from neural crest cells, unsegmented mesoderm capable of forming skeletal muscle and bone, an artery from aortic arch and a nerve that enters it from the brain stem carrying motor fibres to supply the skeletal muscle derived from the mesoderm (4).