What is the relationship of the amniotic sac and the umbilical cord to the developing embryo?

The amniotic sac, filled with amniotic fluid, surrounds and protects the developing embryo, providing a cushioned environment that facilitates movement and helps regulate temperature. The umbilical cord connects the embryo to the placenta, serving as a vital conduit for nutrients, oxygen, and waste removal between the mother and the developing fetus. Together, they support the embryo's growth and development throughout pregnancy.