 Reference Base  Ein weiterer Beitrag zur Kenntnis der Placenten der Ordnu... |
|
Dolinar, Z.J.; Ludwig, K.S.; Mueller, E., 1965. Ein weiterer Beitrag zur Kenntnis der Placenten der Ordnung Perissodactyla: zwei Geburtsplacenten des Indischen Panzernashorns (Rhinoceros unicornis L.). Acta Anatomica 61: 331-354, figs. 1-23
|
|
|
|
| |
| Location: |
Asia |
| Subject: |
Morphology - Embryo (Foetus) |
| Species: |
Indian Rhino |
 |
|
|
The full-term placenta of the rhinoceros is bicornate. One excresence, the large-horn, is wider and longer than the second, the small horn. The villi are distributed over the entire ehorion with the exception of wide villus-free "streets" along the large vascular trunks of the allantochorion. The villi occur in two forms: as leaf-villi and plicate villi. With respect to their microscopic-anatomic structure and their histoehemical reactions, the leaf-villi conform with the finger-like villi of the placentas of the Equidae. Furthermore, along with the usual epithelium, one finds cell tvpes with two nuclei, whose histochemical characteristics conform with those of the diplokaryon of the bovine placentas. We call them Diplokaryons. The plicate villi exhibit the same structure and the same histochemical reactions as the Areolae of the bovine placentas. We consider them as the corresponding functional homolog. The placenta of the rhinoceros therefore assumes an intermediate position between the placentas of the Equidae of the one hand and those of the Bovinae on the other hand.
|
|
|
File available
details
Original text on this topic: