Define placenta and give its significance in human female.

Explanation

### Step-by-Step Solution:

1. **Definition of Placenta**:
- The placenta is a specialized organ that forms during pregnancy, establishing a mechanical and physiological connection between the mother and the developing fetus.

2. **Functions of the Placenta**:
- **Nutrient Transfer**: The placenta allows for the transfer of essential nutrients from the mother to the fetus, ensuring that the fetus receives the necessary components for growth and development.
- **Gas Exchange**: It facilitates the exchange of gases, where oxygen from the mother’s blood is delivered to the fetus, and carbon dioxide and other waste products from the fetus are transferred to the mother for elimination.
...