Question
Describe the formation of the placenta, and explain its functions. (p. 882)
Step 1
The outer layer of the blastocyst, called the trophoblast, differentiates into two layers: the cytotrophoblast and the syncytiotrophoblast. These layers invade the maternal endometrium, forming finger-like projections called chorionic villi. The chorionic villi Show more…
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Describe the hormonal role of the placenta. (page 378 )
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