Pharyngeal arch
Videos
The pharyngeal arches, also known as visceral arches, are transient structures seen in the embryonic development of humans and other vertebrates, that are recognisable precursors for many structures.
Schematic of developing pharyngeal arches and pouches in the human embryo at seried Carnegie stages (CS)
Scheme of the pharyngeal arches
Scheme of the pharyngeal arches I–IV: pharyngeal arches 1–4: pharyngeal pouches (inside) and/or pharyngeal grooves (outside) a: Tuberculum laterale b: Tuberculum impar c: Foramen cecum d: Ductus thyreoglossus e: Sinus cervicalis
Schematic view of the pharyngeal (branchial) arches of an early gnathostome.
Hyoid bone
Videos
The hyoid bone, also known as the lingual bone or the tongue-bone, is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies
Pharyngeal arch
…mechanisms of pharyngeal arch development. The first, most anterior pharyngeal arch (in mammals) gives rise to the mandible. The second arch becomes the hyoid and jaw support. In fish, the other posterior arches contribute to the branchial skeleton, which support the gills; in tetrapods the anterior arches…
The hyoid bone, present at the front of the neck, has a body and two sets of horns
The hyoid bone of a gecko with attached tracheal rings
Hyoid bones of various birds in the Natural History Museum, Vienna