. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. LIVER 271 region which possibly represents the rudiment of the liver (Fig. 219). In Craniates the outgrowth develops into a large vascular and glandular organ, which gives rise to bile, and remains in communi- cation with the intestine by means of one or more bile-duds ^. Fig. 217.—Viscera of Lacerta agilis. (From the ventral side.) Oe, cesophagus ; J/, stomach ; MD, small ; ED, large intestine ; L, liver ; OB, gall-bladder ; Pn, pancreas ; Bl, urinary bladder ; Lg, L(f, the two Inngs, with their network of
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. LIVER 271 region which possibly represents the rudiment of the liver (Fig. 219). In Craniates the outgrowth develops into a large vascular and glandular organ, which gives rise to bile, and remains in communi- cation with the intestine by means of one or more bile-duds ^. Fig. 217.—Viscera of Lacerta agilis. (From the ventral side.) Oe, cesophagus ; J/, stomach ; MD, small ; ED, large intestine ; L, liver ; OB, gall-bladder ; Pn, pancreas ; Bl, urinary bladder ; Lg, L(f, the two Inngs, with their network of vessels; //, heart; Ci, postcaval, Tr, trachea. (Figs. 206, 209, and 216-218). It is united to the body-wall by a fold of the peritoneum, and varies considerably in the number of its lobes: in Mammals there may be as many as six or seven {, Dog, Weasel). We may nevertheless fix upon a ground-form consisting ' The single-lobed liver of the Lamprey undergoes a histological retrogression (fatty metamoi-phosis) after transformation. The tubuli disappear, the cells become filled with fat, and the gall-bladder and bile-duct become 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 Wiedersheim, Robert, 1848-1923; Parker, William Newton, 1857-1923. London, Macmillan
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