What is the primary function of the placenta during pregnancy?

• A. To supply oxygen to the fetus
• B. To provide a protective barrier against all infections
• C. To facilitate the exchange of nutrients and waste
• D. To produce hormones for fetal growth

Answer: (C)

The primary function of the placenta during pregnancy is to facilitate the exchange of nutrients and waste between the mother and the developing fetus. This organ acts as a critical interface, allowing the transfer of essential nutrients such as glucose and amino acids from the mother's blood to the fetus, while also enabling the removal of waste products like carbon dioxide and urea from the fetal circulation.

The placenta is richly supplied with maternal blood vessels, enhancing its ability to effectively exchange these substances without direct mixing of maternal and fetal blood. This unique structure not only supports the growth and development of the fetus but also plays a role in protecting the fetus by regulating what can cross into its bloodstream.

While the placenta does produce hormones that are vital for maintaining pregnancy and promoting fetal growth, its fundamental role revolves around the critical exchange functions, making it indispensable for the overall health and development of the fetus during pregnancy.