The skin has a massive and complex sensory and autonomic nervous system. Every square inch of skin contains 32 feet of nerves. Sensory nerves detect what is happening around us; for instance, pressure, heat, cold, vibrations, pain, and touch are among what is detected by the sensory nerves that reside inside skin layers. The autonomic nervous system mostly controls the temperature of our bodies by constricting or dilating blood vessels.
Skin is the first line of our bodies’ protection, and the nervous system is among the first and most complex body systems that develop in our fetal life.