Sentence Examples


  • As a rule there is no allantoic placenta forming the means of communication between the blood of the parent and the foetus, and when such a structure does occur its development is incomplete.
  • It is urged that the imperfect placenta of the bandicoots instead of being vestigial, may be an instance of parallelism, and that in marsupials generally the allantois failed to form a placental connexion.
  • Finally, there is the hypothesis that marsupials are the descendants of placentals, in which case, as was suggested by its discoverer, the placenta of the bandicoots would be a true vestigial structure.
  • The stomach is simple, the caecum large and capacious, the placenta diffused, and the teats inguinal.
  • P, a thickened line on the walls forming the placenta; c, calyx; d, ovary; s, hooded stigma terminating the short style.

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