Which bone structure connects the nasal cavity to the brain and helps form the base of the skull?

The ethmoid bone is a key component of the skull that plays a significant role in both protecting the brain and forming the structure of the nasal cavity. This delicate bone is located at the roof of the nasal cavity, contributing to the formation of the anterior cranial fossae, which houses the frontal lobes of the brain. Its structure includes the cribriform plate, which contains numerous small holes that allow the olfactory nerves to pass from the nasal cavity to the brain, facilitating the sense of smell. The ethmoid bone's connections to various other skull structures and its positioning make it integral to both the respiratory system and the central nervous system, highlighting its importance in anatomy.