What are the two main parts that make up the skull?

The two main parts that make up the skull are indeed the cranium and the facial bones. The cranium is the dome-shaped part of the skull that encases the brain, providing it with protection, while the facial bones comprise the structure of the face, playing roles in functions such as respiration, mastication, and the formation of cavities for the sensory organs.

The distinction between these two components is fundamental in anatomy, as they serve different purposes. The cranium consists of several bones, including the frontal, parietal, and occipital bones, which all work together to protect the brain. In contrast, the facial bones include structures such as the nasal bones, maxilla, and zygomatic bones, which contribute to the facial structure and support the teeth.

The other options focus on specific bones, but they do not represent the major divisions of the skull in a comprehensive way. Each of those options consists of either individual bones or pairs of bones that belong to either the cranium or the facial bones, but do not encompass the entire classification of the skull structure. Hence, understanding the broader categorization of the skull into cranium and facial bones is essential for grasping the overall anatomy of the head.