Vascularisation of the placenta in some bats

Gopalakrishna, A. ; Badwaik, N. (1990) Vascularisation of the placenta in some bats Proceedings of the Indian Academy of Sciences - Animal Sciences, 99 (4). pp. 289-303. ISSN 0253-4118

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Vascularisation of the placenta of several species of bats representing 8 families is reported. Maternal vascularisation in all these bats is effected by a few large vessels which pass through the entire thickness of the placenta and give rise to numerous radial branches on reaching the foetal surface of the placenta. Maternal blood is returned through placental tubules which empty into large venous channels at the utero-placental junction. Foetal vascularisation is brought about by two allantoic arteries which capillarise over the placental tubules, and a large allantoic vein. In the exchange areas there is mostly crosscurrent circulation of the maternal and foetal bloods. Only in emballonurid bats is there an haematoma from which maternal blood is not drained back but is absorbed by cells of the trophoblast of chorionic villi.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Placenta; Vascularisation; Bats
ID Code:27522
Deposited On:10 Dec 2010 12:07
Last Modified:02 Jun 2011 09:55

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