Organ (biology) Principal

Organ (biology) Principal organs and cardiovascular system and genito-urinary tract of a woman (Leonardo da Vinci, 1507) An organ (Latin Organum: tool), in biology and anatomy, is an associated set of circumstances involved in tissue structure and function . Within biological complexity bodies are at a level of biological organization above and below the tissue system. In cell biology, an organelle or organelle (short body) is a structure or sub compartment -cell, analogous to the organs of multicellular living organisms, which performs a specific function.