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The nervous system allows the body to respond to changes in the environment. This is a process usually coordinated by the brain. Reflex actions are extra-rapid responses to stimuli, and this process also involves the nervous system, but bypasses the brain: - Receptors and effectors - Neurones - Reflex actions At the end there is a test about the topic.

The Brain (diferent parts, rigth and left sides), the Spinal Cord, the Nerves. What to do for your brain.