. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 267. Origin of pancreas and liver. (After Schimkewitsch.) It arises as one or more endodermal outgrowths from the embryonic gut just posterior to the liver. These outgrowths are ordinarily three in number, of which one is dorsal and two are ventral in position (Fig. 267). The two ventral parts fuse together into a common gland, while the ducts formed at each point of outgrowth may either persist, or as is more often the case disappear with the excepti
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 267. Origin of pancreas and liver. (After Schimkewitsch.) It arises as one or more endodermal outgrowths from the embryonic gut just posterior to the liver. These outgrowths are ordinarily three in number, of which one is dorsal and two are ventral in position (Fig. 267). The two ventral parts fuse together into a common gland, while the ducts formed at each point of outgrowth may either persist, or as is more often the case disappear with the exception of one (Fig. 268). The ducts of the ventral components are called Wirsung's ducts, while that of the dorsal pancreas is named the duct of Santorini. In some forms they unite either with each other to make a common duct, or with the bile duct. In lampreys all of the ducts are lost, the secretion of the pancreas consequently becoming entirely endo-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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