Answer:
Brain and the Spinal Cord
Explanation:
Brain is one of the largest and most complex organs in the human body.
is one of the largest and most complex organs in the human body.It is made up of more than 100 billion nerves that communicate in trillions of connections called synapses.
Spinal Cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord, which contains cerebrospinal fluid.
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