The development and the maintenance of the normal tissues are largely due to the assimilation of nutrient substances absorbed from the alimentary canal. The absorption, however, is dependent not so much on the amount of aliment passing along the canal and through the body as on the digested products that pass through the wall of the canal and into the body. Although the extreme complexity of the anabolic processes is far beyond comprehension at present, it is possible to know something about digestion and absorption from the course of the aliment through the canal, and its final molding in the form of the feces.
THE ANABOLIC PROCESSES AND THE INTEGRITY OF THE BODY
The alimentary canal is a highly specialized organ, purposely designed for mixing, reducing and absorbing its contents. The disorders of this organ cannot often be due to imperfections in its mechanism, but are the result rather of
BURNETT FL. VARIATIONS OF THE INTESTINAL RATE. JAMA. 1925;85(23):1777-1781. doi:10.1001/jama.1925.02670230009002