A connective tissue covering is the dura matter, a white stretchy that covers the entire nervous system and protects the brain from impacts Another connective tissue covering is white matter which runs in three directions and that is ascending, descending, and transverse and the white matter is divided into three white columns which was lateral, ventral conterior, and dorsal (posterior) and it is myelinated and nonmyelinated axons.The gray matter is short, nonmyelinated neurons and cell bodies
Endoneunium is loose CT that encloses axons and myelin sheaths, The perineurium is the coarse CT that hundles fiber into facides, and the epineurium and tough fibrous sheath around all fascides to form nerves.