. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. 272 COMPARATIVE ANATOMY. l. inrsonr-phros (see p. 296), and body-walls (Fig. 215, VC, EC alld Fig. 21G,£0/.r, ). The antrriiir cardinal ruins, \\ hi. FL's. -17 t L'J'.t1: tin- posterior cardinals soon become largely oblrti-ratrd. and are re-placed by thr a/.v;4»s and vertebral vein:-, and more especially by the postcaval (vma cava posteriory inferior) l-'i':s. :.'17 to lii'.i . For farther details as to the venous circulation, ;7. the portal system (which becomes in
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. 272 COMPARATIVE ANATOMY. l. inrsonr-phros (see p. 296), and body-walls (Fig. 215, VC, EC alld Fig. 21G,£0/.r, ). The antrriiir cardinal ruins, \\ hi. FL's. -17 t L'J'.t1: tin- posterior cardinals soon become largely oblrti-ratrd. and are re-placed by thr a/.v;4»s and vertebral vein:-, and more especially by the postcaval (vma cava posteriory inferior) l-'i':s. :.'17 to lii'.i . For farther details as to the venous circulation, ;7. the portal system (which becomes in ; b\- tin- subintestinal ;. tin- jvadi-r is to \'"\£<. 217 to 219. AA. FIG. 216.—DIACIIAM OF TIIK ov TIIF, Yoi,K-S.\c AT THE END OF Tin: TIIIIMI D\v UK IN TIIK CHICK. (After Balfour.) If, heart: AA, the second, third, and fourth aortic arclu-s: the first has become oltliti-ratrd in its nu-dian iiortion, but is cuntiinu-d at its proximal end as the external , and at its distal md as tin- ind-nial carotid ; Ao, dorsal a black. Tin- \vhnh- i to In- viewed from below. has removed tnuii the c<^, and is supposed Hence the left is seen mi the ri^ht, and r/<r ;?. To ivturn onco nioro to tbc arterial system : — We must consider next tin- t\vu Inaiicln-s of the dorsal aorta known as the allantoic arteries 'Fi-. -15, All). As tlu-ir name implies, these arteries branch outov-T the allantois, which arises as an outgrowth from. 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, W. N. (William Newton), d. 1923. London, New York, Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondonnewyorkmacmi
