What is the primary function of the trophoblast cells in the blastocyst?

The primary function of trophoblast cells in the blastocyst is to develop into the placenta. These outer layer cells play a crucial role in the early stages of pregnancy, as they facilitate implantation of the blastocyst into the uterine wall. The trophoblast cells contribute to forming the critical structures necessary for providing nutrients and exchanging wastes between the mother and the developing fetus. As the pregnancy progresses, the trophoblast will form structures such as the chorion, which is part of the placenta, thus supporting fetal development throughout gestation. This unique role underscores the importance of trophoblasts in establishing the maternal-fetal interface.