Fetal villosity and microvasculature of the bovine placentome in the second half of gestation

Journal of Anatomy
R LeiserB Hoffmann

Abstract

The architecture of the fetal villous tree and its vasculature in the bovine placentome were studied in the second half of gestation using both conventional histology and histology of ink-filled blood vessels. These were compared with corrosion casts of plastic fillings of the vasculature, prepared for scanning electron microscopy. This combination of morphological methods allows perception of the villous tree throughout gestation from broad-conical to tall-conical form where branch ramification occurs mainly at right angles to the stem. The stem villus typically contains a single central artery and several peripheral veins arranged in parallel. The proximal branches to the stem, the intermediate villi, contain a central arteriole and accompanying venules. The distal branches, the terminal villi, enclose capillary convolutions which consist of an afferent arterial capillary limb, capillary loops and efferent venous capillary limbs. Vascular interconnections exist within the terminal villi, as capillaries or venules between the capillary convolutions, serially bridging them in up to 5 places, and as capillary anastomoses between the capillary loops. Coiling and sinusoidal dilatations of these loops develop near the end of gestat...Continue Reading

References

Jan 1, 1992·Placenta·R B Wilkening, G Meschia
May 1, 1990·Journal of Reproduction and Fertility·L P ReynoldsD A Redmer
Dec 1, 1985·Biology of Reproduction·T J ReimersW Hansel
Jan 1, 1994·Experimental and Clinical Endocrinology·R Leiser, P Kaufmann
Jul 1, 1997·Microscopy Research and Technique·R LeiserV Dantzer

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Citations

Dec 28, 2012·The Journal of Reproduction and Development·Motoki SasakiNobuo Kitamura
Jan 3, 2006·Reproduction : the Official Journal of the Society for the Study of Fertility·Marcelo BertoliniGary B Anderson
Aug 14, 2009·Australian Veterinary Journal·J C HunnamS McDougall
Oct 18, 2005·Placenta·L P ReynoldsD A Redmer
Jun 9, 2015·Animal Health Research Reviews·Thomas R HansenHana Van Campen
Oct 20, 2010·Journal of Reproductive Immunology·T M ChucriM A Miglino
May 9, 2016·Theriogenology·J-D HaegerC Pfarrer
Dec 8, 2016·Reproduction in Domestic Animals = Zuchthygiene·M M KamalG Opsomer
Sep 1, 2012·Anais Da Academia Brasileira De Ciências·Claudia M de OliveiraMaria Angélica Miglino
May 31, 2007·Anatomia, histologia, embryologia·M M M Abd-ElnaeimR Leiser

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