Vascular pattern of the uterus and ovary in Shiba-goats.

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  • TANAKA Mikio
    Department of Veterinary Surgery and Obstetrics, Faculty of Agriculture, University of Tokyo Faculty of Agriculture, Yamaguchi University
  • ITO Nobuo
    Department of Veterinary Surgery and Obstetrics, Faculty of Agriculture, University of Tokyo
  • YAMAUCHI Makoto
    Nippon Veterinary and Zootechnical College

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  • シバヤギの子宮，卵巣へ分布する血管系の検討
  • シバヤギ ノ シキュウ ランソウ エ ブンプスル ケッカンケイ ノ ケントウ

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Abstract

In order to elucidate vascular connections between the uterus and ovary, colored latex was infused into abdominal aorta and vena cava to make casting specimens. <BR>It was shown that the vascular system of the uterus and ovary in the shiba-goat closely resembled that of the ewe. In both specise, the ovarian artery branched off from abdominal aorta (Figs. 1 &3), then ran tortuously over the surface of the ovarian vein. Of three branches of the ovarian artery (ovarian, uterine and tubal), the ovarian branch is the major one and the other two are judged as minor branches (Figs. 2 & 4). <BR>It is suggested that in the shiba-goat most of the venous blood coming from the uterus flows into the uterine branch of the ovarian vein through the venous plexus which are formed adjacent to the uterine horn. The remaining venous blood of the uterus seemed to flow into the uterine vein. <BR>From these results, putative route by which luteolytic factor produced by the uterus is transmitted down to the ovary was discussed. <BR>The results of the present study suggested that the transfer of luteolytic factor derived from the uterus to the ovary in the shiba-goat may depend upon "Counter Current Mechanism" as presumed previously in the ewe by BARRETT et al. (1971).

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