File:Sabin1915 plate03.jpg

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Plate 3

Fig. 6. Transverse section of an embryo pig 9.5 mm long in which the entire vascular system has been injected with India-ink through the umbilical artery. The section is unstained and is 250 M thick. It passes through the lower half of the Wolffian body and is to be compared with fig. 2. X36.

A., aorta; o. s., position of a ganglion spinale; v. c. P., v. cardinalis posterior; v. c. M., v. cardinalis mesialis; v. T. M., v. transversa mesialis of the Wolffian body, connecting the v. cardinalis posterior with the v. cardinalis mesialis; v. T. v., v. transversa ventralis of the Wolffian body, the leader being at the position of the v. ventralis at a little later stage; v. s., v. spinalis; v. u., v. umbilicalis; w. D., Wolffian duct.

Fig. 7. Dissection of an embryo pig 14 mm long in which the vascular system has been injected with India ink through the umbilical artery. The left Wolffian body has been removed, the right one is in place. X20.

A. s., a. spinalis; D. c., ductus Cuvier; P. P., prevertebral plexus of veins from the body-wall and from the spinal cord entering the Wolffian body in a sagittal plane lateral to the v. hemiazygos, the lower part of which plexus becomes a prevertebral caval plexus; v. A., v. azygos in the form of its antecedent capillary plexus; v. M. I., v. mammaria interna; v. j. E., v. jugularis externa; v. TE., v. thoracoepigastrica.

Fig. 8. Transverse section of an embryo pig 13.5 mm long in which the vascular system has been injected with India-ink through the umbilical artery. The section passes through the cephalic half of the Wolffian body and is to show the prevertebral capillary plexus in which the v. azygos and the v. hemiazygos develop. The section is unstained and is 250 M thick. It is about the stage of the specimen in fig. 7. X40.

A., aorta; A. s., a. spinalis; P. v. A., plexus in which the vena azygos develops; v. u ., vein of the body-wall; v. TE., v. thoraco-epigastrica; v. s., v. spinalis; v. T., v. transversa of the Wolffian body; x., plexus of capillaries lateral to the myotome.



Sabin 1915: plate 1 | plate 2 | plate 3 | plate 4 | plate 5 | plate 6 | plate 7 | pig


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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, March 4) Embryology Sabin1915 plate03.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Sabin1915_plate03.jpg

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