. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. B. FIG. 229.—A, HEART OF Laccrta muralis, AND B, OF A LARGE Varanus, SHOWN CUT OPEN ; C, DIAGRAM OF THE REPTILIAN HEART. V, y1, ventricles ; A, A1, atria ; tr, Trcn, innonii- nl i nate trunk ; 1, 2, first and second arterial arch ; Ap, Ap1, pulmonary artery ; Vp, pulmonary vein ; t and *, right and left aortic arch ; RA, root of aorta ; Ao, dorsal aorta ; Ca, Ca1, carotids ; Asc, As, subclavian arteries ; J, jugular vein ; Vs, subclavian vein ; Ci, postcaval. These three veins open into the sinu
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. B. FIG. 229.—A, HEART OF Laccrta muralis, AND B, OF A LARGE Varanus, SHOWN CUT OPEN ; C, DIAGRAM OF THE REPTILIAN HEART. V, y1, ventricles ; A, A1, atria ; tr, Trcn, innonii- nl i nate trunk ; 1, 2, first and second arterial arch ; Ap, Ap1, pulmonary artery ; Vp, pulmonary vein ; t and *, right and left aortic arch ; RA, root of aorta ; Ao, dorsal aorta ; Ca, Ca1, carotids ; Asc, As, subclavian arteries ; J, jugular vein ; Vs, subclavian vein ; Ci, postcaval. These three veins open into the sinus venosus, which lies on the dorsal side of the heart, above the point indicated by the letter S. In the diagram C the pre- and postcavals are indicated by Vc, Vc, only one precaval being represented. aortic root may be made up at its origin of two arches, anas- tomosing with one another (Lacerta) (Fig. 229, A, 1, 2), or of one only (certain Lizards, Snakes, Chelonians, and Crocodiles) (Fig. 229, B, HA, RA}. The most posterior arterial arch gives rise to the pulmonary artery (Ap) (comp. also Fig. 221, A, B). 1 A small aperture of communication between the ventricles, the foramen Panizzae, exists in Crocodiles. Near it, between the origin of the left aorta and the pulmonary artery, there is a small cartilage, as in 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
