in Neural Control and Coordination (Nervous System) by

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The basic components of central nervous system are the brain and the spinal cord. All the nervous activities are incorporated by the central nervous system.

Brain: The brain is a complex organ situated in the skull/cranium. Cranium is a bony structure to protect the skull. The average weight of the brain is about1400g. There is no lymphatic drainage to the brain.

Spinal cord: Spinal cord is the continuation of the brain. Similar to the brain the spinal cord is also protected by a bony structure called as the vertebral column or the back bone.

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