හවුල් ශ්‍රව්‍ය

Now this image shows the nervous system. This system includes the brain, spinal cord, and nerves, and it works like a fast communication network. Let’s connect this with real-life examples. When you touch a hot object, your skin sends a signal immediately. When you feel cold, your body starts shivering automatically to generate heat. And when you catch a ball, your eyes, brain, and hands all coordinate perfectly. In all these cases, the nervous system is working very fast to give quick responses