What is the connection between fetal blood circulation and the placenta?

• A. Blood is always oxygenated from the placenta
• B. Blood flow is directed towards the liver first
• C. Blood relies on the placenta for oxygen and nutrient exchange
• D. Blood returns to the placenta to regain oxygen after birth

Answer: (C)

The connection between fetal blood circulation and the placenta is vital for the development and health of the fetus. The placenta serves as the primary organ of exchange, facilitating the transfer of oxygen and nutrients from the maternal blood to the fetal bloodstream while also removing waste products from the fetal circulation.

In the fetal circulatory system, the blood must reach the placenta to receive oxygen and essential nutrients, which are critical for growth and development. Unlike postnatal circulation, where blood is oxygenated through the lungs, in fetal circulation, oxygenation occurs in the placenta. This organ acts as an interface where the maternal and fetal blood flow are closely positioned, allowing for efficient gas exchange without actually mixing the two blood systems.

Therefore, the correct choice emphasizes the dependency of the fetal blood on the placenta for oxygen and nutrient supply throughout gestation, highlighting the placenta's crucial role in ensuring fetal well-being.