The maxilar superior, or upper jawbone, is a crucial part of the human skull. It forms the upper jaw and holds the upper teeth in place. This bone also plays a significant role in shaping the face and supports the nasal cavity and the orbits of the eyes. Additionally, the maxilar superior connects with several other bones in the skull, including the nasal bones and zygomatic bones. It contains the maxillary sinuses, which are air-filled spaces that help lighten the skull and contribute to voice resonance. Proper function of the maxilar superior is essential for chewing and speaking.