The hyoglossus is an extrinsic muscle of the tongue. It is located in the floor of the oral cavity, immediately lateral to the geniohyoid muscle. Attachments: Arises from the hyoid bone and inserts onto the lateral aspect of the tongue. Function: Depression and retraction of the tongue. Innervation: Hypoglossal nerve. Blood supply: Lingual artery with contributions from the tonsillar artery. By TeachMeSeries Ltd (2025) Fig 1The extrinsic muscles of the tongue. Note the palatoglossus muscle is not included in this illustration. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article