The sphenoid bone (also known simply as the sphenoid) is a butterfly-shaped single bone that lies at the middle part of the base of the skull between the frontal, temporal and occipital bones. The sphenoid bone consists of the following parts: Body of the sphenoid - the central portion; Greater wings (2) and lesser wings (2) - extend laterally from the body; Pterygoid processes (2) - descend from the junction of the body and greater wings. The body, greater wings and pterygoid processes can be i

The ethmoid bone is a singular porous cranial bone that makes up the middle area of the neurocranium and forms the midfacial region of the skull. It contributes to the formation of the orbit, nasal cavity, nasal septum and the floor of the anterior cranial fossa. The ethmoid bone is an important piece of the skull, especially due to the cribriform plate, which allows the olfactory fibers to pass through in order for you to smell things. The ethmoid bone is a spongy, irregular bone of the skull.