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The Dred Scott decision represented a stunning defeat for the pro-slavery movement.
Cerebrospinal fluid
A clear, colorless body fluid found in the brain and spinal cord, acting as a cushion for the brain's cortex, providing basic mechanical and immunological protection to the brain inside the skull.
Arachnoid mater
A delicate membrane that is one of the three layers of the meninges, situated between the dura mater and the pia mater, enveloping the brain and spinal cord.
Interneurons
Structures found only in the central nervous system that link sensory and motor neurons together.
Efferent nerves
Nerves that carry signals away from the central nervous system to effectors like muscles and glands, facilitating action and response.
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