. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 504 ANATOMY OF VERTEBRATES. 332 portal vein: this dilates and describes a spiral curve on entering the liver, and has a valvular structure ensuring the onward flow of blood to the elongated gland, during the compression exercised in the contortions of the Snake. The hepatic veins enter the j^ostcaval, and this large trunk terminates in the hind end of the long auricular sinus. The blood from the head and fore-part of the body is re- turned to the fore-part of the sinus by a jugular vein and an inferior azygos vein, each
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 504 ANATOMY OF VERTEBRATES. 332 portal vein: this dilates and describes a spiral curve on entering the liver, and has a valvular structure ensuring the onward flow of blood to the elongated gland, during the compression exercised in the contortions of the Snake. The hepatic veins enter the j^ostcaval, and this large trunk terminates in the hind end of the long auricular sinus. The blood from the head and fore-part of the body is re- turned to the fore-part of the sinus by a jugular vein and an inferior azygos vein, each of which has a pair of valves at its termination : and by a su- perior azygos vein, which has three valves at its termination: there is a fourth vein, answer- ing to the left precaval, which passes behind the left auricle to terminate in the right sinus auricula? near the postcaval orifice: it receives the coronary vein before its termination. In Lacertians the blood from the liind limbs is partly conveyed by a reni-portal vein, fig. ., K, to the kid- neys, and partly by a trunk, which communicates with the caudal vein to an umbilical or sub-abdominal vein, L: this, as it advances, collects blood from the ventral walls of the trunlc, and receives a recur- rent thoracic vein: it then communicates with the trunk of the gastro-intestinal, pan- Olrculatioii III aLiznra{Xr(aii'/0C(7/a^(). CrCatic and Sl^louic VoluS to form the great portal vein which penetrates the liver. The renal veins, li, unite to form the postcaval, v, which afterwards receives the hepatic veins, and proceeds to the auricular sinus. A small cardinal or azygos vein, returning part of the blood from the tail, advances along the back part of the abdominal. 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 Owen, Richard, 1804-1892; Co
Size: 993px × 2517px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
