The placenta is connected to the embryo through an `ul((A))`.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the structure that connects the placenta to the embryo.

2. **Identifying the Connection**: The placenta is an essential organ that develops during pregnancy and facilitates the exchange of nutrients, gases, and waste between the mother and the developing embryo.

3. **Recognizing the Structure**: The specific structure that connects the placenta to the embryo is a cord.

4. **Naming the Cord**: This cord is known as the **umbilical cord**. It plays a crucial role in connecting the embryo to the placenta.

5. **Function of the Umbilical Cord**: The umbilical cord allows for the transport of substances, such as oxygen and nutrients, from the mother to the embryo and the removal of waste products from the embryo to the mother.

6. **Final Answer**: Therefore, the answer to the question is that the placenta is connected to the embryo through an **umbilical cord**.

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