The nervous system
The nervous system
The nervous system detects changes in the environment and coordinates responses. Information travels rapidly as electrical impulses along specialised cells called neurones. A nerve is a bundle of nerve fibres, primarily axons from many neurones, surrounded by supporting connective tissue and supplied by blood vessels.
Step-by-step lessons on AQA GCSE Biology 5.2.1 Structure and function. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.