The extrinsic blood vessels of the ovary of the sheep
| Autor: | C. S. Lee, J. D. O'Shea |
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| Rok vydání: | 1976 |
| Předmět: |
Models
Anatomic endocrine system Plexus Sheep endocrine system diseases Ovary Anatomy Anastomosis Biology Ovarian artery female genital diseases and pregnancy complications Apposition medicine.anatomical_structure medicine.artery Luteolysis medicine Animals Blood Vessels Arterial blood Female Animal Science and Zoology Vein Developmental Biology |
| Zdroj: | Journal of Morphology. 148:287-303 |
| ISSN: | 1097-4687 0362-2525 |
| DOI: | 10.1002/jmor.1051480303 |
| Popis: | The extrinsic ovarian blood vessels were studied in 134 ewes. In view of recent evidence that uterine luteolysis may involve local veno-arterial transfer of prostaglandin F2α in the ovarian pedicle, particular attention was paid to the interrelationships between veins and arteries. The ovarian artery and utero-ovarian vein are large vessels of conventional structure and lie in close apposition. Their walls are slightly thinner on their apposing sides. The ovarian branches of the ovarian artery are very tortuous, and closely intertwined with the plexiform ovarian branches of the utero-ovarian vein. An extensive plexus of small veins surrounds the ovarian artery and its ovarian branches. Within this plexus are many thin-walled, dilated regions, interspersed with narrow, thick-walled segments. Valves are inconstantly present at sites of entry of branches of the plexus into the major veins. Small numbers of arterio-venous anastomoses are present in the distal part of the ovarian pedicle. Unless blood can flow in a veno-arterial direction through arterio-venous anastomoses or capillary beds, the structural barrier between uterine venous and ovarian arterial blood is substantial. |
| Databáze: | OpenAIRE |
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