few line on brain for class 2
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A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals
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its a organ of the human body
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A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body. In a human, the cerebral cortex contains approximately 14–16 billion
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