Which feature characterizes the trophoblast?
A) Trophoblast cells adhere to each other but lack adhesion molecules on their exposed surfaces.
B) The trophoblast digests its way into the endometrium until it is fully embedded in the uterine wall.
C) The trophoblast is the last extraembryonic membrane to form in placental mammals.
D) Trophoblast cells use proteolytic enzymes secreted by the inner cell mass.
E) The trophoblast surrounds the zona pellucida.

Question

Quizplus · Accepted Answer

The trophoblast is characterized by its ability to actively invade the endometrium by digesting its way into the uterine wall until it is fully embedded. This invasive behavior is crucial for establishing the connection between the embryo and the maternal blood supply.

Which Feature Characterizes the Trophoblast