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Microvascular anatomy of testes in the adult pipid frog, Xenopus laevis Daudin : a scanning electron microscopic study of vascular corrosion casts
VerfasserLametschwandtner, Alois ; Minnich, Bernd
Erschienen in
Acta Zoologica, Hoboken, 2018, Jg. 2018, S. 1-8
ErschienenHoboken : Wiley, 2018
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)histomorphology / scanning electron microscopy / testes / vascular casts
URNurn:nbn:at:at-ubs:3-11610 Persistent Identifier (URN)
 Das Werk ist frei verfügbar
Microvascular anatomy of testes in the adult pipid frog, Xenopus laevis Daudin [2.24 mb]
Zusammenfassung (Englisch)

The threedimensional microvascular anatomy of the testes of adult Xenopus laevis was studied by scanning electron microscopy of vascular corrosion casts. Results showed that testicular arteries branch off from urogenital arteries and approach the testes via the mesorchium. At the dorsal surface of testes, arteries course towards the medial and lateral surfaces of the ovoid testes, pierce the tunica albuginea and run in the subalbugineal space and then penetrate the testicular parenchyma. In the parenchyma, they branch in all directions. At sites where larger branches arise, sphincters are present. Intimal cushions are found at the origin of smaller branches. Terminal arterioles capillarize and form a widemeshed capillary network around convoluted seminiferous tubules. Inter and peritubular capillaries cannot be differentiated reliably. Arteriovenous transition distances are short. Arterioarterial anastomoses and venovenous anastomoses are present. Testicular venules empty into a venous subalbugineal plexus which shows venovenous anastomoses of different lengths and calibres. Signs of the ongoing nonsprouting angiogenesis, particularly intussusceptive branch remodelling, reflect the dynamics of the testicular parenchyma. The present study is the first that demonstrates the testicular microvascular anatomy in an anuran species and shows that X. laevis and men share the intricate convoluted seminiferous tubules with associated vascular patterns as a feature in common.

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