(a) The hard palate is formed anteriorly by the palatine processes of the maxilla bones and posteriorly by the horizontal plate of the palatine bones. (b) The complex floor of the cranial cavity is formed by the frontal, ethmoid, sphenoid, temporal, and occipital bones. The lesser wing of the sphenoid bone separates the anterior and middle cranial fossae. The petrous ridge (petrous portion of temporal bone) separates the middle and posterior cranial fossae.
Cut Rita Zahara
“External and Internal Views of Base of Skull ,” Open Educational Resource (OER) - UNM, accessed February 28, 2020, http://oer.unm.ac.id/items/show/1048.