The blood vascular wreath of rat ovarian follicle, with special reference to its changes in ovulation and luteinization: A scanning electron microscopic study of corrosion casts

T. Murakami, Y. Ikebuchi, Aiji Ohtsuka, A. Kikuta, Takehito Taguchi, O. Ohtani

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Blood vascular casts of rat ovaries were prepared by injection of a low viscosity methacrylate medium, and observed by scanning electron microscopy. The proper vascular pattern of the rat ovarian follicle starts as a basket-like wreath of fine capillaries around the primary follicle. As the follicle grows larger, the wreath becomes more developed. The fully developed wreath around the Graafian follicle consists of sinusoidal capillaries. In ovulation, the apical area of the wreath is opened and the basal area of the wreath is elevated. After ovulation, the wreath shrinks and its opened area is closed, with markedly dilated vessels directly continuous with the arterial capillaries. The wreath then transforms, by intense new formation of capillaries, into a conglomerated sinusoidal capillary plexus with an avascular area within it. The avascular area soon disappears by continued intense formation of capillaries in the plexus, and a complete and dense vascular network of the corpus luteum is formed. The capillaries of the fully developed corpus luteum are small in caliber and not sinusoidal in nature. Discontinuities of the capillaries and a flattening of the efferent branches are the initial signs of the degeneration of the corpus luteum. The small markedly degenerated corpus luteum contains only scattered thready capillaries. The corpus albicans contains few blood vessels.

Original languageEnglish
Pages (from-to)299-313
Number of pages15
JournalArchives of Histology and Cytology
Volume51
Issue number4
Publication statusPublished - 1988

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Luteinization
Ovarian Follicle
Corrosion
Ovulation
Blood Vessels
Electrons
Corpus Luteum
Methacrylates
Viscosity
Electron Scanning Microscopy
Ovary

ASJC Scopus subject areas

  • Anatomy
  • Histology

Cite this

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title = "The blood vascular wreath of rat ovarian follicle, with special reference to its changes in ovulation and luteinization: A scanning electron microscopic study of corrosion casts",
abstract = "Blood vascular casts of rat ovaries were prepared by injection of a low viscosity methacrylate medium, and observed by scanning electron microscopy. The proper vascular pattern of the rat ovarian follicle starts as a basket-like wreath of fine capillaries around the primary follicle. As the follicle grows larger, the wreath becomes more developed. The fully developed wreath around the Graafian follicle consists of sinusoidal capillaries. In ovulation, the apical area of the wreath is opened and the basal area of the wreath is elevated. After ovulation, the wreath shrinks and its opened area is closed, with markedly dilated vessels directly continuous with the arterial capillaries. The wreath then transforms, by intense new formation of capillaries, into a conglomerated sinusoidal capillary plexus with an avascular area within it. The avascular area soon disappears by continued intense formation of capillaries in the plexus, and a complete and dense vascular network of the corpus luteum is formed. The capillaries of the fully developed corpus luteum are small in caliber and not sinusoidal in nature. Discontinuities of the capillaries and a flattening of the efferent branches are the initial signs of the degeneration of the corpus luteum. The small markedly degenerated corpus luteum contains only scattered thready capillaries. The corpus albicans contains few blood vessels.",
author = "T. Murakami and Y. Ikebuchi and Aiji Ohtsuka and A. Kikuta and Takehito Taguchi and O. Ohtani",
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T1 - The blood vascular wreath of rat ovarian follicle, with special reference to its changes in ovulation and luteinization

T2 - A scanning electron microscopic study of corrosion casts

AU - Murakami, T.

AU - Ikebuchi, Y.

AU - Ohtsuka, Aiji

AU - Kikuta, A.

AU - Taguchi, Takehito

AU - Ohtani, O.

PY - 1988

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AB - Blood vascular casts of rat ovaries were prepared by injection of a low viscosity methacrylate medium, and observed by scanning electron microscopy. The proper vascular pattern of the rat ovarian follicle starts as a basket-like wreath of fine capillaries around the primary follicle. As the follicle grows larger, the wreath becomes more developed. The fully developed wreath around the Graafian follicle consists of sinusoidal capillaries. In ovulation, the apical area of the wreath is opened and the basal area of the wreath is elevated. After ovulation, the wreath shrinks and its opened area is closed, with markedly dilated vessels directly continuous with the arterial capillaries. The wreath then transforms, by intense new formation of capillaries, into a conglomerated sinusoidal capillary plexus with an avascular area within it. The avascular area soon disappears by continued intense formation of capillaries in the plexus, and a complete and dense vascular network of the corpus luteum is formed. The capillaries of the fully developed corpus luteum are small in caliber and not sinusoidal in nature. Discontinuities of the capillaries and a flattening of the efferent branches are the initial signs of the degeneration of the corpus luteum. The small markedly degenerated corpus luteum contains only scattered thready capillaries. The corpus albicans contains few blood vessels.

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