This document lists the foramina and apertures found in the three cranial fossae and describes their contents. The anterior cranial fossa contains foramina for the nasal emissary vein, olfactory nerves, and vessels/nerves associated with the ethmoid bone. The middle cranial fossa contains optic canals, fissures, and foramina transmitting cranial nerves and vessels. The posterior cranial fossa transmits the medulla, vertebral arteries, cranial nerves, veins and arteries through openings like the foramen magnum and jugular foramen.