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The Brain and Addiction
Images and text for this gallery courtesy of The National Institute on Drug Abuse (NIDA) http://165.112.78.61/NIDAHome.html.

<< 1/12 > The central nervous system is composed of both the brain and the spinal cord. The brain is a functional unit; it is made up of billions of nerve cells (neurons) that communicate with each other using electrical and chemical signals.

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