The development of the human body; a manual of human embryology . etwork(Fig. 148, A) traversing the liver substance and unitingagain to form two stems which represent the original con-tinuations of the omphalo-mesenterics. From the pointwhere the common trunk formed by the right omphalo-mesenteric and umbilical veins opens into the Cuvierianduct a new vein develops, passing downward and to theleft to unite with the left omphalo-mesenteric; this is theductus venosus (Fig. 148, B, DVA). In the mean timethree cross-connections have developed between the two24 282 THE DEVELOPMENT OF THE HUMAN BOD
The development of the human body; a manual of human embryology . etwork(Fig. 148, A) traversing the liver substance and unitingagain to form two stems which represent the original con-tinuations of the omphalo-mesenterics. From the pointwhere the common trunk formed by the right omphalo-mesenteric and umbilical veins opens into the Cuvierianduct a new vein develops, passing downward and to theleft to unite with the left omphalo-mesenteric; this is theductus venosus (Fig. 148, B, DVA). In the mean timethree cross-connections have developed between the two24 282 THE DEVELOPMENT OF THE HUMAN BODY. omphalo-mesenteric veins, two of which pass ventral andthe other dorsal to the intestine, so that the latter is sur-rounded by two venous loops (Fig. 149, A), and a connec-tion is developed between each umbilical vein and thecorresponding omphalo-mesenteric (Fig. 148, B), that ofthe left side being the larger and uniting with the omphalo-mesenteric just where it is joined by the ductus venosusso as to seem to be the continuation of this vessel (Fig. 148, DC,. JiC. MK4 JTus
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
