Материал: Анатомия черепа
A suture is a fibrous joint found only in the skull. The parietal bones (in blue) come together to form the sagittal suture and also form the coronal suture with the frontal bone.
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The sphenoid and the ethmoid are not part of the calvaria but are part of the cranium. They protect the underside of the brain.
The sphenoid is a bat-shaped bone and is the keystone bone at the base of the cranium.
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The ethmoid is a spongy, cubed bone that gives shape to part of the roof of the nose and the orbits.
The ethmoid is also home to numerous foramina through which the branches of the olfactory nerves pass.
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While the frontal bone gives shape to the forehead, orbits, and nasal cavity, it is not part of the facial skeleton. It is part of the calvaria.
The frontal bone articulates with 12 other bones (10 of the 12 belong to the facial skeleton).
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Before moving on, keep this in mind:
8 bones form the cranium. |
14 bones form the facial skeleton. |
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