The rate at which new editions of human body charts come out varies from organization to organization, but the renowned anatomical reference work "Gray's Anatomy" received its most recent revision in 2015. The previous edition of the text came out in 2008.
Anatomists have already thoroughly cataloged the human body's various organs and tissues, so human organ charts rarely require revision. The human body has very few remaining anatomical secrets. However, in 2015, researchers at the University of Virginia found a new part of the human body, the so-called "central nervous system lymphatic vessels," deep inside the tissues that surround the brain. These vessels drain lymphatic fluid from the brain into nearby lymph nodes.