. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 262 DEVELOPMENT OF THE VENOUS SYSTEM left umbilical now forms the only route for the return of blood from the placenta, and appears to be the direct continuation of the ductus venosus (Fig. 161, C), into which open the hepatic veins, returning the blood distributed by the portal vein to the substance of the liver. Returning now to the posterior cardinal veins, it has been found that in the rabbit the branches which come to them from the mesen- tery anastomose longitudinally to form a vessel l
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 262 DEVELOPMENT OF THE VENOUS SYSTEM left umbilical now forms the only route for the return of blood from the placenta, and appears to be the direct continuation of the ductus venosus (Fig. 161, C), into which open the hepatic veins, returning the blood distributed by the portal vein to the substance of the liver. Returning now to the posterior cardinal veins, it has been found that in the rabbit the branches which come to them from the mesen- tery anastomose longitudinally to form a vessel lying parallel and slightly ventral to each cardinal. These may be termed the sub-. A £ Fig. 162.—Diagrams Illustrating the Development or the Inferior Vena Cava. The cardinal veins and ductus venosus are black, the subcardinal system blue, and the supracardinal yellow, cs, coronary sinus; dv, ductus venosus; il, iliac vein; r, renal; s, internal spermatic; scl, subclavian; sr, suprarenal; va, azygos; vha, hemi- azygos; vi, innominate; vj, internal jugular. cardinal veins (Lewis), and in their earliest condition they open at either end into the corresponding cardinal, with which they are also united by numerous cross-branches. Later, in rabbits of mm., these cross-branches begin to disappear and give place to a large cross-branch situated immediately below the origin of the superior. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
