Skulls are the bony structures that form the head in many animals, including humans. They protect the brain and support the facial features. The human skull consists of 22 bones, which are divided into the cranial bones that encase the brain and the facial bones that shape the face. In addition to protection, skulls play a role in the sensory systems, housing the eyes, ears, and nasal passages. Different species have unique skull shapes and sizes, reflecting their adaptations to various environments and lifestyles. For example, the skull of a lion differs significantly from that of a bird.