Your nerves are spread all over your body，The organs　of thehody are composed.of microscopic.units called cells，specialized to pefform particular funetions　SUCh　as　secretion　contraction　or conduction.Likewise the tis—sues that make up our nervous system are composed of billions ofindividual cells locared all over the human hody，No part of ourbody is completely insensitlye　to pain or some other sensation，　be—cause nerves are to be found in every part of the human anatomy.