Your body's largest organ is the skin. Its longest bone is the femur. And its longest neuron? It's the one that stretches all the way from your brain into your big toe. That's a long way for brain signals to go, but they get help from a very important substance called myelin. When myelin breaks down, as it does in diseases like multiple sclerosis (MS), all sorts of things can go wrong.
What Is Multiple Sclerosis?
Written by Curiosity Staff April 8, 2017
Wake up with the smartest email in your inbox.
Our Best Articles Daily