Which bone is situated at the back of the mouth and forms the lower jaw?

The bone situated at the back of the mouth that forms the lower jaw is the mandible. The mandible is the largest and strongest bone of the face, playing a key role in chewing and speaking. It holds the lower teeth in place and provides structural support for the face. Additionally, it connects to the skull at the temporomandibular joint (TMJ), allowing for movement necessary for activities such as eating and talking.

In contrast, the maxilla is the upper jawbone, which holds the upper teeth and forms part of the orbits of the eyes. The palatine bones are located at the back of the oral cavity and contribute to the structure of the hard palate and floor of the nasal cavity. The vomer is a singular bone that forms part of the nasal septum, separating the left and right airways in the nasal cavity. Together, these other bones play important roles, but they do not form the lower jaw as the mandible does.