The liver may be regarded as a system of branching bile ducts which terminate in numerous blind tubules, the bile canaliculi. The walls are formed by the liver cells, which are externally in contact with the capillaries of the portal venous system and the hepatic arterial system: these cells are homogeneous and show no obvious signs of differentiation or specialization. But in spite of its anat...

developmental sequences new types of abnormality, either hitherto un-described or published merely as rare and unexplained findings, can be understood and traced to their embryological sources." The discussion of anomalies is in terms of aberrant growth and disturbances of the growth sequence per se. Thus, although the preface states that "The ultimate cause of these slight local changes of gro...