trophoblast

The trophoblast is a layer of cells that forms the outer part of a developing embryo, specifically in early pregnancy. Its primary role is to connect the developing embryo to the mother's uterine wall, enabling nutrient and oxygen transfer, and facilitating the removal of waste. The trophoblast also develops into a significant part of the placenta, which supports the embryo throughout pregnancy. It is essential for implantation and establishing the initial blood supply between mother and baby, making it a crucial structure for healthy pregnancy development.