Talk about the organization of nerve fibers

A peripheral nerve is a set of nerve fibers (myelinated and amyelinated, sensory/ afferent and motor/ efferent) grouped in fascicles or bundles and surrounded by connective tissue. The dense connective tissue that surrounds the entire nerve is referred to as the epineurium. It brings the different bundles together. It contains many blood and lymphatic vessels. Inside the nerve, each bundle of fibers is surrounded by a sheath of dense connective tissue thinner than the epineurium: this is the perineurium. Fine connective septae derive from the perineurium and pass between the nerve fibers, forming the endoneurium, a loose connective tissue with many blood capillaries, that covers each nerve fiber.