Brain

The brain is the central organ of the nervous system in humans and most animals. It processes sensory information, controls movement, regulates bodily functions, and is responsible for cognition, emotions, memory, and learning. The human brain contains approximately 86 billion neurons, interconnected by trillions of synapses. It is protected by the skull and surrounded by cerebrospinal fluid. Different regions of the brain perform specialized functions, such as the cerebrum for higher thought, the cerebellum for coordination, and the brainstem for basic life support. The study of the brain is called neuroscience.
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LanguageENGLISH Content typeCOLLECTIONLast updateSEPTEMBER 17, 2025 AT 22:55:49 UTC