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| Description: 3 DAYS 10—11. The yolk sac, embryonic disk, and amniotic cavity have started to form from the blastocyst. Actual size DAY 12. Blood-filled spaces form in maternal tissue. The chorionic cavity starts to form. a Actual size 8 DAY 14. A connecting stalk has formed between the embryonic disk and the chorion. Chorionic villi, which will be features of a placenta, start to form. Picture Stats: Views: 196 Filesize: 272.48kB Height: 637 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=44402 |