The spaces within the brain are called ______ and are filled with ____ fluid
A) gray matter; spinal.
B) neurons; dendrite.
C) frontal lobes; motor cortex.
D) ventricles; cerebrospinal fluid.
Answer: D
Rationale: Within the brain are spaces called ventricles, which are filled with cerebrospinal fluid, a solution that helps to eliminate wastes and provides nutrition and hormones to the brain and spinal cord.
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