The skin, all 6-10 lb. (~3-4 kg) and 20 square feet in an adult, is a giant, washable, stretchable, tough, water-proof sensory apparatus covering your whole body. One of the endings that detect things is a encapsulated nerve ending formed by the tiny nerve cell of a dorsal root ganglion cell in next to a Merkel cell found in the basal layer hairy skin, in hair follicles, and in oral and anal mucosa.This called the Merkel disc and is a sensory receptor for pressure and texture information.