What Does the Arch Region in Fish Develop Into? Pharyngeal Arches Explained
The first pharyngeal arch in fish develops into the oral jaw. The second arch forms the hyoid, providing jaw support. Other arches create the branchial skeleton, which supports the gills. In tetrapods, anterior arches evolve into the ear, tonsils, and thymus, showing the arches’ important evolutionary role. The first pharyngeal arch morphs into the jaw … Read more