The placenta is an organ located in the gravid uterus that connects the mother and fetus via the umbilical cord. Of the following, which is a function of the umbilical cord?
  1. Transports nutrients
  2. Transports hormones
  3. Transports oxygen and carbon dioxide
  4. All of the above
Explanation
Answer: D - All of the above.

The umbilical cord is connected to the placenta and the fetus. The functions of the umbilical cord includes:
1) Transport of excretory substances
2) Transport of nutritients
3) Transport of respiratory gases
4) Transport of hormones and enzymes
5) Circulation of blood
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