What is the name of the horseshoe-shaped bone that is the only movable bone of the skull?

The horseshoe-shaped bone that is the only movable bone of the skull is known as the mandible. This bone plays a crucial role in the structure of the jaw, allowing for movement in functions such as chewing and speaking. Unlike the other bones listed, the mandible is attached to the skull via a movable joint, enabling it to open and close. This mobility is essential for various actions, such as mastication (chewing food) and articulation (producing speech).

The maxilla, while important for facial structure and holding the upper teeth, is stationary. Similarly, the palatine bone forms part of the hard palate of the mouth and is also immovable. The temporal bone is part of the side of the skull and does not exhibit movement relative to the other skull bones. This distinction emphasizes the unique role of the mandible in facilitating movement within the skull.