This is a lithograph plate from Gray's Anatomy. Unless stated otherwise, it is from the online edition of the 20th U.S. edition of Gray's Anatomy of the Human Body, originally published in 1918. Online editions can be found on Bartleby and also on Yahoo!.
Caption: The relations of the viscera and large vessels of the abdomen. (Seen from behind, the last thoracic vertebra being well raised.)
This image is in the public domain because its copyright has expired. This applies worldwide.