Each part with : 1-Glandular fossa for the sublingual gland
2-nerve groove for the lingual nerve “Sometime when you do tooth extraction for the wisdom tooth you cut it by mistake because its close to the root of the wisdom tooth .
Mental spines :
At the inner angle of the mandible .
Origin for Genioglossus and Geniohyoid .
Submandibular fossa : for submandibular gland
Mylohyoid groove : For mylohoid nerve which is a branch from inferior alveolar nerve that is a branch from the mandibular nerve which is a branch from trigeminal nerve .
Ramus of the mandible :For insertion .