 This arch also gives rise to the muscles of mastication.Meckel's cartilage forms in the mesoderm of the mandibular process and eventually regresses to form 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 perichondral ossification using Meckel's cartilage as a 'template', but the maxillary does "not" arise from direct ossification of Meckel's cartilage.