<prompt> The least radio sensitive tissue is -Nervous tissueBoneKidneyThyroid  <response>: Human Cell Radiation Sensitivity High Lymphocytes white blood cells Spermatogonia sperm-producing cells Erythroblasts immature red blood cells Intestinal crypt cells small intestine Mid Spermatids non-dividing immature sperm Osteoblasts immature bone cells Low Muscle cells Nerve cells 