Final answer:
The brain is in the cranial cavity inside the skull, while the spinal cord is in the spinal cavity within the vertebral column, both protected by cerebrospinal fluid.
Explanation:
The brain is located in the cranial cavity, which is situated inside the skull. Protected by the bones of the skull and cerebrospinal fluid, the brain is a vital organ of the central nervous system.
The spinal cord, on the other hand, is housed in the spinal cavity within the vertebral column. It runs the length of the trunk and is also crucial for transmitting nerve signals.
Cerebrospinal fluid is the fluid that surrounds and protects both the brain and spinal cord.
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