One of my favorite images from one of my favorite online exhibitions: the National Library of Medicine's Dream Anatomy. Called "Medical Anatomy...," this chromolithograph is the product of a collaboration between anatomist Francis Sibson and artist William Fairland.
From the website:
Sibson argued that anatomical illustrations are misleading because preservative injections and the dissection itself change the relative position of parts. This double illustration is intended to show a true picture of the dead body alongside an imaginative reconstruction of the same interior in a living body.