Cell Complex tissues are composed of numerous cell populations in which function with different radio-sensitivity, and are characterized by a complex interplay mediated by signal transduction networks. Therefore, the various normal tissues and proliferation take place organs throughout the body show substantial differences in the same cells (otherwise called ‘flexible tissues’ or ‘conditional renewing tissues’)their clinical radiation responses. ([[ICRP Publication 118]], 2012)
''[[ICRP Glossary]] entry - June 2019''