Human placenta is..........., ................... and...............

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Types of Human Placenta**: The human placenta can be classified into three main types based on its structure and function.

2. **First Type - Chorionic**: The first type is known as the **Chorionic placenta**. This name is derived from the chorion, which is the outermost layer surrounding the embryo. The chorion plays a crucial role in protecting the embryo from the external environment.

3. **Second Type - Hemochorial**: The second type is referred to as the **Hemochorial placenta**. This term indicates that the chorion is in direct contact with the mother's blood. The blood vessels from the mother flow into spaces created by the chorionic villi, allowing for efficient nutrient and gas exchange between the mother and the developing embryo.

...