Which one of the following best describes the function of the umbilical cord? It:(a) feeds the embryo with digested substances.
(b) conveys nutrients and wastes to and from the embryo respectively
(c) removes waste matter from the embryo to the mother's blood.
(d) supplies oxygenated blood from the mother to the embryo.

Correct Answer: (b) conveys nutrients and wastes to and from the embryo respectively.

Explanation:

 The exchange of nutrients, oxygen and waste products between the embryo and the mother's blood occurs through the umbilical cord.