A curved or bow-shaped structure. The alveolar arch is the bow-shaped alveolar process of either the maxilla or mandible. The first branchial arch is located between the stomodeum and the first pharyngeal groove and develops into the mandibular and maxillary processes. The palatine arch (pillars of the fauces) consists of the two curved folds of mucous membrane enclosing the muscles at the sides of the mouth at the entrance to the pharynx. The zygomatic arch is formed by the zygomatic bone and the zygomatic process of the maxilla and the temporal bone.