Fetal development of the mesonephric artery in humans with reference to replacement by the adrenal and renal arteries

Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft
Nobuyuki HinataMasato Fujisawa

Abstract

According to the classical ladder theory, the mesonephric arteries (MAs) have a segmental arrangement and persist after regression of the mesonephros, with some of these vessels becoming definitive renal arteries. To avoid interruption of blood flow, such a vascular switching would require an intermediate stage in which two or more segmental MAs are connected to a definitive renal artery. To examine developmental changes, especially changes in the segmental distribution of MAs, we studied serial paraffin sections of 26 human embryos (approximately 5-7 weeks). At 5-6 weeks, 1-2 pairs of MAs ran anterolaterally or laterally within each of the lower thoracic vertebral segments, while 2-5 pairs of MAs were present in each of the lumbar vertebral segments, but they were usually asymmetrical. The initial metanephros, extending along the aorta from the first lumbar to first sacral vertebra, had no arterial supply despite the presence of multiple MAs running immediately anterior to it. Depending on increased sizes of the adrenal and metanephros, the MAs were reduced in number and restricted in levels from the twelfth thoracic to the second lumbar vertebra. The elimination of MAs first became evident at a level of the major, inferior pa...Continue Reading

References

Mar 4, 2011·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Shogo HayashiTakashi Nakano
Sep 15, 2012·Okajimas Folia Anatomica Japonica·Hirokazu NaritaYoshikazu Tonosaki
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Mar 19, 2014·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·R TurynaV Baca

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Citations

Dec 19, 2016·Journal of Vascular Surgery. Venous and Lymphatic Disorders·Roy M FujitaniMayil S Krishnam
Oct 6, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kenichiro FukuokaAkio Matsubara
Oct 4, 2018·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Veronica MacchiRaffaele De Caro
Oct 10, 2018·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Blanca MompeóJose R Sanudo
Jan 18, 2020·Anatomy & Cell Biology·Hyun-Bong LeeSang-Pil Yoon
Oct 19, 2019·Tissue Engineering and Regenerative Medicine·Jianye ZhangShengtian Zhao
Jan 26, 2021·Case Reports in Urology·Shivika AhujaDaniel Daly

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