<prompt> Which of the following is most susceptible to ionizing radiation?Mature boneSmall lymphocytesNerve cellsEpithelial cells  <response>: Tissues that have high sensitivity are lymphoid organs, bone marrow, testes, intestines, mucous membranes. Tissues with intermediate sensitivity are fine vasculature, growing cartilage cartilage, salivary glands, lungs, kidneys and liver. Tissues with low sensitivity include optic lens, mature erythrocytes, muscle cells and neurons. 