The mylohyoid muscle or diaphragma oris is a paired muscle of the neck. It runs from the mandible to the hyoid bone, forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth. It forms the floor of the submental triangle. It elevates the hyoid bone and the tongue, important during swallowing and speaking.
Mylohyoid muscle
In jawed vertebrates, the mandible, lower jaw, or jawbone is a bone that makes up the lower – and typically more mobile – component of the mouth.
Front view
left side
Medial surface of the right body and ramus, the latter penetrated by the mandibular foramen (right)
German illustration with jawbones cut away to show the inferior alveolar nerve branching to the mandible's dental alveoli and passing through the mental foramen