28. Human Development
Implantation
Multiple Choice
Multiple ChoiceThe trophoblast eventually differentiates into two layers. Which of these layers erodes the endometrium and begins projecting extensions into the uterine lining?
A
The cytotrophoblast.
B
The syncytiotrophoblast.
C
The blastocyst.
D
The morula.
71
views
Related Videos
Related Practice