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Encyclopedia > First branchial arch
It has been suggested that this article or section be merged into branchial arch. (Discuss)

The first branchial arch, also called the first pharyngeal arch and mandibular arch, is the first of six branchial arches that develops in fetal life. It is located between the stomodeum and the first pharyngeal groove. Wikipedia does not have an article with this exact name. ... Schematic of developing fetus with first, second and third arches labeled. ... Schematic of developing fetus with first, second and third arches labeled. ...

This arch divides into a maxillary process and a mandibular process, which are the bones of the middle third and lower third of the face and contain the arches of the jaws. The maxillary process becomes the maxilla, or upper jaw, and palate. The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... The mandible (inferior maxillary bone) (together with the maxilla) is the largest and strongest bone of the face. ... Grays illustration of a human femur, a typically recognized bone. ... Faces of Mother, Child. ... The jaw is either of the two opposable structures forming, or near the entrance to, the mouth. ...

A cartilage (Meckel's cartilage) forms in the mesoderm which becomes the incus and malleus of the middle ear; the anterior ligament of the malleus and the sphenomandibular ligament. The mandible or lower jaw forms by intramembranous ossification. It has been suggested that endoderm be merged into this article or section. ... The incus is the anvil-shaped small bone or ossicle in the middle ear. ... The malleus is hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. ... An ear is an organ used by an animal to detect sound waves. ... The mandible (inferior maxillary bone) (together with the maxilla) is the largest and strongest bone of the face. ... Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ...

The artery of the first arch is the first aortic arch, which partially persists as the maxillary artery. The maxillary artery is the larger of the two terminal branches of the external carotid artery. ...

The nerve associated with the first branchial arch is the trigeminal nerve (mandibular branch). Note that maxillary process also carries its own branch of the trigeminal nerve, the maxillary. The associated cartilage is Meckel's cartilage. The associated muscles are the muscles of mastication. Nerves (yellow)    Nerves redirects here. ... The trigeminal nerve is the fifth (V) cranial nerve, and carries sensory information from most of the face, as well as motor supply to the muscles of mastication (the muscles enabling chewing), tensor tympani (in the middle ear) and other muscles in the floor of the mouth, such as the... Mastication is a name for the process of breaking up of food and mixing it with saliva. ...

Derivatives of the first arch:

Many animals have longer and more flexible tongues than humans. ... In human anatomy, the masseter is one of the muscles of mastication. ... Pterygoid can refer to: a plate near the Vomer bone a muscle such as Lateral pterygoid muscle or Medial pterygoid muscle This is a disambiguation page — a navigational aid which lists pages that might otherwise share the same title. ... The temporalis muscle is one of the muscles of mastication. ... The Mylohyoid muscle, flat and triangular, is situated immediately above the anterior belly of the Digastricus, and forms, with its fellow of the opposite side, a muscular floor for the cavity of the mouth. ... The digastric muscle (named digastric as it has two bellies) is a small muscle located under the jaw. ... The tensor tympani muscle arises from the auditory tube and inserts onto the handle of the malleus, damping down vibration in the ossicles and so reducing the amplitude of sounds. ...


  • Harris, Edward F., 2002. Craniofacial Growth and Development.
  • McMinn, R., 1994. Last's anatomy: Regional and applied (9th ed).



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