It’s one of those occasions in biology (not rare) when the term “intelligent design,” despite other merits, falls flat as a description.
Consideration of the basic characteristics of nerve impulse propagation suggests that the speed of conduction in mammals is close to the maximum possible.
Design with interdependent layers presents a challenge to neo-Darwinism. Natural selection is oblivious to anything but an immediate beneficial variation.
Our skin and our insides are laced with an invisible, highly sophisticated, selective, neurological netting.