Translations:Manfred Klett: Von der Agrartechnologie zur Landbaukunst/1458/en

Adhering to the abdominal cavity wall, directly beneath the spine, it carries the entire intestinal convolution. From both sides of the abdominal cavity, the single-layered peritoneum of the abdominal cavity folds itself together into a serosa double-leaf, the mesentery, in such a way that its sense-active sides face outward into the abdominal cavity (Figure 31). The serosa double lamellae divide at the small intestine (*Jejunum*) and invest it as a single lamella. The mesentery thus forms a fold-wreath that follows the tightly-packed loops of the small intestine through a good portion of the abdominal cavity. Between the two serosa leaves of the mesentery lie the nerve strands (they ramify into both leaves and stand in connection with the digestive process in the small intestine), as well as arterial and venous blood vessels (which sustain the intensive life processes in the intestine), lymph ducts (which take up through the intestinal mucosa [*Mucosa*] the digestive fluids [*Chylus*]), lymph nodes (which act in a detoxifying capacity), and finally connective tissue and fat deposits. The structure of the mesentery as a part of the peritoneum is thus constituted such that it is simultaneously sense organ and organ of activity. It mediates the digestive activity (outer world) to the total organism (inner world), and conversely.