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This lesson covers the structure and function of the brain and the eye, including accommodation and vision defects. This is essential content for Edexcel GCSE Biology (1BI0) Topic 2: Cells and Control.
The human brain is part of the central nervous system (CNS). It is the main coordinating centre of the body, receiving information from receptors and sending instructions to effectors. The brain contains billions of neurones connected by trillions of synapses.
The brain has several distinct regions, each with a specific function:
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