Pharyngeal arches
Introduction
The pharyngeal arches (branchial arch, Greek, branchial = gill) are a series of externally visible anterior tissue bands lying under the early brain that give rise to the structures of the head and neck. Each arch though initially formed from similar components will differentiate to form different head and neck structures. In humans, five arches form (1,2,3,4 and 6) but only four are externally visible on the embryo.
Each arch has initially identical structures: an internal endodermal pouch, a mesenchymal (mesoderm and neural crest) core, a membrane (endoderm and ectoderm) and external cleft (ectoderm). Each arch mesenchymal core also contains similar components: blood vessel, nerve, muscular, cartilage.
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Cite this page: Hill, M.A. (2024, June 20) Embryology Pharyngeal arches. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Pharyngeal_arches
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G