This image is a derivative work of the following images: File:Placentation.svg licensed with Cc-by-3.0 2008-12-01T21:15:31Z Kevin Dufendach 458x734 (501663
Dufendach, K. (Artist). (2008). Placentation. [Web]. Retrieved from http://commons.wikimedia.org/wiki/File:Placentation.svg English URL: https://commons
