This single bone is considered a cranial bone. It articulates with every other cranial bone. It also articulates with the zygomatic, vomer, maxillary, and palatine bones. It has many important landmarks including: the greater and lesser wings, the sinuses, the sella turcica, and the pterygoid processes. It also has a number of significant foramina including,: rotundum, ovale, the optic canal, the superior orbital fissure, as well as others.