Skull Bones Quiz Flashcards

Skull Anatomy Overview

• The skull consists of numerous bones that provide structure and protect the brain.
• Key bones include the frontal, parietal, temporal, occipital, sphenoid, ethmoid, and facial bones.

Major Bones

• Frontal Bone: Forms the forehead and upper part of the eye sockets.
• Parietal Bone: Two bones that form the sides and roof of the cranium.
• Temporal Bone: Located at the sides and base of the skull, contains essential structures for hearing.
• Occipital Bone: Forms the back and base of the skull, contains the foramen magnum.
• Sphenoid Bone: Complex shape, contributes to the cranial floor and sides.
• Ethmoid Bone: Contributes to the cranium and forms part of the nasal cavity.
• Facial Bones: Includes maxilla, nasal, lacrimal, zygomatic, vomer, and palatine bones.

Sutures and Features

• Coronal Suture: Joint between the frontal bone and the parietal bones.
• Sagittal Suture: Joint that runs along the midline between the two parietal bones.
• Squamous Suture: Joint between the temporal bone and the parietal bone.
• Lambdoid Suture: Joint that separates the occipital bone from the parietal bones.

Key Features of Temporal Bone

• Mastoid Process: Projection behind the ear, serves as an attachment point for neck muscles.
• External Auditory Meatus: Canal that leads from the outer ear to the eardrum.
• Mandibular Fossa: Depression where the mandible (jaw) articulates with the skull.
• Zygomatic Arch: Bony structure that forms the prominence of the cheek.

Mandible Characteristics

• Mandible: Lower jawbone, only movable bone of the skull.
• Body of Mandible: The horizontal, flat part of the mandible.
• Ramus of Mandible: Vertical part extending from the body, connects to the skull.
• Mental Foramen: Opening in the mandible that allows nerves and blood vessels to enter the jaw.

Conclusion

• Understanding these bones and their features is essential for comprehending skull anatomy and function in cranial protection and facial structure.