🧠Central (CNS)brain + spinal cord: the control centre

🌐Peripheral (PNS)nerves branching to every part of the body

👀Sensory neuronscarry messages FROM senses TO the CNS

🏃Motor neuronscarry commands FROM the CNS TO muscles

🔗Interneuronsconnect neurons inside the CNS

⚡Speedsignals travel up to 120 m/s (430 km/h)!