Definition: 'Pharyngeal Arches'
pharyngeal archesType: Term
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.
The information shown above for pharyngeal arches is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.