更多allantoic例句

1. The last of these can be dismissed, in consequence of the recent discovery of an allantoic placenta in Perameles.
2. It was for a long time held that the Marsupials differed from all other mammals in having no allantoic placenta.
3. It implies on the whole that the Marsupials have sprung from a stock with an allantoic placenta.
4. More remarkable still is the development of a small allantoic placenta.
5. As the allantois increases in size and importance, the allantoic vessels are correspondingly developed.