Which bone forms the upper jaw?

Which bone forms the upper jaw?

• A. Maxilla
• B. Mandible
• C. Zygomatic
• D. Nasal

Answer: (A)

The bone that forms the upper jaw is the maxilla. It houses the upper teeth and forms much of the roof of the mouth, as well as parts of the floor of the eye socket and the sides of the nasal cavity. The maxilla also contributes to the hard palate through its palatine processes. In development, it is a paired bone that fuses at the midline. The other bones listed have different roles: the mandible is the lower jaw, the zygomatic bone forms the cheekbone, and the nasal bones create the bridge of the nose.

The bone that forms the upper jaw is the maxilla. It houses the upper teeth and forms much of the roof of the mouth, as well as parts of the floor of the eye socket and the sides of the nasal cavity. The maxilla also contributes to the hard palate through its palatine processes. In development, it is a paired bone that fuses at the midline. The other bones listed have different roles: the mandible is the lower jaw, the zygomatic bone forms the cheekbone, and the nasal bones create the bridge of the nose.