The Tree-Like Structure of Your Nervous System

Your nervous system is literally built like a tree growing inside your back. It starts deep in

the spinal cord where tiny rootlets bunch up to form massive roots. These guys have

strict roles. The front roots are the movers, blasting signals to your muscles

so you can actually move. The back roots are the feelers, dragging sensations

up to your brain, and they even have a little bump called a ganglion. They eventually

crash together to form the spinal nerve trunk, a mixed superhighway carrying both traffic

types at once. Then it splits into branches that wire your whole body, proving nature just

loves reusing a good design.