Bones of Axial Skeleton
Terms
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- Axial Skeleton
- Longitudinal axis of the body composed of: the skull, the vertebral column and the bony thorax
- Skull
- Composed of the cranium and facial bones
- Cranium
- Composed of 8 bones: Frontal bone, Parietal bones, Occipital bone, Sphenoid bone, Ethmoid Bone, Temporal bones
- Frontal Bone
- Forehead, bony projections under the eyebrows, superior portion of eye orbits
- Parietal Bones
- Paired, Superior lateral walls of cranium
- Temporal Bones
- Inferior to parietal bones
- Occipital Bone
- Posterior bone of the cranium, forms floor and back wall of skull
- Foramen Magnum
- large opening in the base of the occipital bone
- Occipital Condyles
- on each side of foramen magnum, rest on first vertebra of spinal column
- Sphenoid Bone
- butterfly-shaped, spans width of skull
- Sella Turcica
- depression in Sphenoid Bone that holds pituitary gland in place
- Ethmoid Bone
- anterior to sphenoid bone, roof of nasal cavity and part of medial walls of eye orbits
- Facial Bones
- 14: Maxillae, Palatine Bones, Zygomatic Bones, Lacrimal Bones, Nasal Bones, Vomer Bone, Inferior Conchae, Mandible