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# Bones of the Cranium There are 8 bones that form the cranium, which is the bony structure that protects the brain. * **Sphenoid (1)** * **Temporal (2)** * **Ethmoid (1)** * **Parietal (2)** * **Occipital (1)** * **Frontal (1)** ## Frontal The frontal bone is flat and has 3 parts: * Squamous *...

# Bones of the Cranium There are 8 bones that form the cranium, which is the bony structure that protects the brain. * **Sphenoid (1)** * **Temporal (2)** * **Ethmoid (1)** * **Parietal (2)** * **Occipital (1)** * **Frontal (1)** ## Frontal The frontal bone is flat and has 3 parts: * Squamous * Orbital * Nasal The frontal bone aids in facial expressions and the frontalis muscle. ## Parietal The parietal bones are flat and have 4 parts: * Frontal * Occipital * Sphenoidal * Mastoid Angle ## Occipital The occipital bone is flat and has 3 parts: * Squamous * Basilar * Lateral This bone forms the foramen magnum. ## Temporal The temporal bones are irregular and have 5 parts: * Squamous * Petrous * Tympanic * Mastoid * Styloid The styloid process is an anchor point for muscles dealing with tongue and larynx. ## Ethmoid The ethmoid bone is located in the paranasal sinuses and is a part of the anterior cranial fossa floor of the cranial cavity. It has 4 parts: * Cribriform plate (1) * Perpendicular plate (1) * Ethmoid labyrinths (2)