Final answer:
The most superior tip of the perpendicular plate of the ethmoid bone is called the crista galli, serving as an anterior attachment point for brain coverings.
Step-by-step explanation:
The name of the most superior tip of the perpendicular plate of the ethmoid bone is the crista galli. The perpendicular plate helps form the upper portion of the nasal septum, contributing to the nasal cavity's division. Along with the cribriform plates, which contain numerous small openings for nerve branches, the crista galli serves as an attachment point for one of the covering layers of the brain. The ethmoid bone also includes lateral walls that form part of the medial orbit wall and gives rise to the superior nasal concha and middle nasal concha. The ethmoid bone forms the upper portion of the nasal septum and also forms the lateral walls of the upper nasal cavity. The superior nasal concha and middle nasal concha, which are thin, curved projections, extend from each lateral wall into the nasal cavity.