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1990 Fiscal Year Final Research Report Summary

Functional Morphology of Countercurrent Transfer System

Research Project

Project/Area Number 01560286
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 畜産学(含草地学)
Research InstitutionNihon University (1990)
The University of Tokyo (1989)

Principal Investigator

NISHIDA Takao  Nihon Univ., Coll. of Agr. & Vet. Med., Professor, 農獣医学部, 教授 (20023426)

Co-Investigator(Kenkyū-buntansha) KUROHMARU Masamichi  Univ. of Tokyo, Fac. of Agr., Associate Professor, 農学部, 助教授 (00148636)
HAYASHI Yoshihiro  Univ. of Tokyo, Fac. of Agr., Professor, 農学部, 教授 (90092303)
Project Period (FY) 1989 – 1990
Keywordscountercurrent transfer / spermatic cord / pampiniform plexus / rete mirabile
Research Abstract

1. There were no direct connections between the testicular artery and vein in the golden hamster, rat, boar, goat and ox. However, the arterial and venous wall reduced the thickness by sharing a common tunica adventitia.
2. The lymphatic vessels, mast cells and macrophages were widely distributed within the loose connective tissue of the testicular arteriovenous walls. These histological findings suggest that the mast cells may play a role in the coutercurrent transfer mechanism.
3. The direct connection between the testicular artery and pampiniform plexus was observed in the tree shrew and squirrel spermatic cord. From the ultrastructure of vesiculated cells situated in the A. -V. shunt wall, it is suggested that these vesiculated cells are active in synthesizing the substance which effects a control of the shunt diameter.
4. The testicular veins in the boar spermatic cord could be subdivided morphologically into 4 types. The type IV vein was arranged in the tunica media of the testicular artery and was regarded as a portal vessel, being considered to be the most important vessel in promoting the countercurrent transfer between the testicular arteries and veins.
5. A carotid body-like structure was observed in the rete mirabile and cavernous sinus complex. This ultrastructure corresponded with that of carotid body which lay in the angle of division of the internal and external carotid arteries.
6. In the injection of HRPO into the cattle trigeminal and trochlear nerves, HRPO positive nerve fibers and nerve cells were recognized only in the trochlear nerve.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Rerkamnuaychoke,W.,Nishida,T.,Kurohmaru,M.and Hayashi,Y.: "Vascular morphology of the golden hamster Spermatic cord." Arch.Histol.Cytol.,. 52. 183-190 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rerkamnuaychoke,W.,Nishida,T.,Kurohmaru,M.and Hayashi,Y.: "Morphological studies on the vascular architec ture in the mammalian spermatic cord." J.Vet.Med.Sci.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rerkamnuaychoke,W.,Nishida,T.,Kurohmaru,M.and Hayashi,Y.: "Evidence for the direct connection(AーV shunt) between testicular artery and pampiniform plexus in the spermatic cord of the tree shrew." J.Anat.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nishida,H.,Rerkamnuaychoke,W.,Osawa,K.and Hayashi,Y.: "Vascular morphology and its nerve supply of epidural rete mirabile in the goat and cattle." Anat.Histol.Embryol.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rerkamnuaychoke, W., Nishida, T., Kurohmaru, M. and Hayashi, Y: "Vascular morphology of the golden hamster spermatic cord" Arch. Histol. Cytol.52(2). 183-190 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Rerkamnuaychoke, W., Nishida, T., Kurohmaru, M. and Hayashi, Y: "Morphological studies on the vascular architecture in the mammalian spermatic cord" J. Vet. Med. Sci.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Rerkamnuaychoke, W., Nishida, T., Kurohmaru, M. and Hayashi, Y: "Evidence for the direct connection (A-V shunt) between testicular artery and pampiniform plexus in the spermatic cord of the tree shrew" J. Anat.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nishda, T., Rerkamnuaychoke, W., Osawa, K. and Hayashi, Y: "Vascular morphology and its nerve supply of epidural rete mirabile in the goat and cattle" Anat. Histol. Embryol.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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