Duodenum, 1866 illustration. The duodenum (the first part of the small intestine) is at centre and bottom, receiving digestive fluids from the gall bladder (green, upper right) and the pancreas (yellow, centre left). This is part of plate 13 from the third volume of 'Atlas d'anatomie descriptive du corps humain' (1844-1866) by French anatomists Constantin Bonamy and Paul Broca. This work described the anatomy of the human body with over 250 hand-coloured lithographs. The illustrations were by Emile Beau, with the text by Bonamy and Broca. The three volumes were bound as four books in 1866 when the atlas was completed. This page is from the third book 'Digestion', a republication of the section on the digestive system that was first published in 1850.