The dorsal body cavity can be divided into the cranial cavity, which contains the brain, and the vertebral cavity, which contains the spinal cord.
The cranial cavity is the space where the brain is present. The cavity consists of 8 cranial bones. These together are termed as neurocranium. The cavity s meant to protect the brain from any injury. The bones of the cranial cavity are: occipital, two parietal, frontal, two temporal, ethmoid and sphenoid bones.
Vertebral cavity is a long and narrow cavity that encloses the spinal cord and protects it . It is a fluid-filled space. Inside the cavity there is also present a three layered membrane called meninges.
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