Which bone is involved in the formation of the orbit?

The correct answer is that all of the bones listed are involved in the formation of the orbit. The orbit is a complex structure formed by several bones, and each of them contributes to its overall framework.

The frontal bone forms the superior (upper) part of the orbit, providing the upper boundary and contributing to the protection of the eye. The sphenoid bone plays a crucial role as well, particularly in the posterior part of the orbit and containing parts that contribute to the optic canal, allowing for the passage of the optic nerve. The temporal bone, while primarily associated with the side and base of the skull, also extends into the orbit laterally and houses important structures like the zygomatic arch, which can influence the orbit’s shape and size.

Understanding the contributions of each of these bones is essential for appreciating the anatomy of the skull and the functionality of the orbit, including housing the eye and its associated structures such as muscles, nerves, and blood vessels.