Write the functions of placenta.

Explanation

### Step-by-Step Solution:

1. **Definition of Placenta**:
- The placenta is a specialized tissue that forms a connection between the embryo and the uterine wall of the mother. It acts as an interface for the exchange of substances between the mother and the developing embryo.

2. **Nutrient and Oxygen Transfer**:
- One of the primary functions of the placenta is to facilitate the transfer of essential nutrients and oxygen from the mother to the embryo. This transfer occurs through the mother's blood supply, ensuring that the embryo receives the necessary components for growth and development.

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