Consists of the Central Nervous System (brain and spinal cord) and the Peripheral nervous system (everything else). PNS contains somatic nervous system (muscles and sense) and the automonic nervsous ssystem (heart, intestines, etc.). The ANS consists of sympathetic and parasympathetic response.

Consists of medulla, pons, cerebellum. The medulla, pons, the midbrain, and certain structures of the forebrain constitute the brainstem.

Consists of the cerebral cortex; which receives sensory information and responsible for thinking, perceiving, producing and understanding language

Important for sensory processing.

Contain fluid that provides the buoyancy and cushioning for the brain.