The life-support systems for the embryo include the
A) umbilical cord, placenta, and amnion.
B) circulatory, nervous, and digestive systems.
C) digestive system, umbilical cord, and amnion.
D) nervous system, digestive system, and umbilical cord.

Question

Quizplus · Accepted Answer

The umbilical cord connects the embryo to the placenta, which is responsible for exchanging gases and nutrients with the mother's bloodstream. The amnion is a fluid-filled sac that provides a cushion and protection for the developing embryo. Thus, A is the best choice as it includes all three life-support systems for the embryo. Choice B and C are incorrect as they do not include the umbilical cord and placenta, which are crucial for the embryo's survival. Choice D is incorrect as it does not include the placenta or amnion, both of which are important for fetal development.

The Life-Support Systems for the Embryo Include the