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contentuptodate· Content· item f7_16_7428

©2013 UpToDate ® Print Email Branchial arch derivatives (A) Lateral view of the head and neck region of a 4-week embryo demonstrating the branchial arches participating in formation of the bones of the face and neck. (B) Definitive structures formed from branchial arch mesenchyme. Reproduced with permission from: Sadler T. Langman's Medical Embryology, Ninth Edition. Baltimore: Lippincott Williams & Wilkins, 2003. Copyright © 2003 Lippincott Williams & Wilkins.