File:Sabin1915 plate06.jpg

Plate 6

Fig. 13. Dissection of an embryo pig 17 mm. long in which the vascular system has been injected with India ink through the umbilical artery. X21.

A., aorta; D. c., ductus Cuvier; p. p., prevertebral plexus which receives veins from the body-wall and from the spinal cord and drains into the Wolffian body in a sagittal plane lateral to the hemiazygos vein; v. HA., v. hemiazygos; v. M. I., v. mammaria interna; v. TE., v. thoraco-epigastrica.

Fig. 14. Diagram from the embryo pig measuring 24 mm. long to show the relations of the symmetrical segments of the inferior vena cava to the median mesonephritic vein and to the remnants of the posterior cardinal vein in stages measuring from 20 to 27 mm. long. The parts of the large median vein marked with a cross are from the posterior cardinal vein. The dotted lines separate the part of the median vein which persists from that which disappears with the Wolffian body.

A., aorta; K., kidney; v. c., v. caudalis; v.c.i., vena cava inferior; v.c. i. L., vena cava inferior, lower segment; v. F. p., v. fibularis primitiva; v. M. M., v. mediana mesonephritica; V.T..V. transversa of the Wolffian body.

Fig. 15. Dissection of an embryo pig 20 mm. long, a little younger than the specimen of figs. 4 and ."i. The specimen has been injected with silver nitrate through the veins and is to show the stage at which the v. azygos and the v. cardinalis posterior are equal in size and both empty into the duct of Cuvier. XS.

D. c., ductus Cuvier; v. A., v. azygos; v. c. A., v. cardinalis anterior or v. jugularis interna ; v. c. I., vena cava inferior; v. c. P., v. cardinalis posterior; v. j. E., v. jugularis externa; v. TE., v. thoraco-epigastrica; w. B., Wolffian body.

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References

Sabin FR. On the fate of the posterior cardinal veins and their relation to the development of the vena cava and azygos in the embryo pig. (1915) Pub. No. 223 Contrib. Embryol., Carnegie Inst. Wash. 3(7): 5-32. PDF

Cite this page: Hill, M.A. (2024, April 27) Embryology Sabin1915 plate06.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Sabin1915_plate06.jpg

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