During gaseous exchange the gases diffuse from high partial pressure to low partial pressure.

Answer

### Step-by-Step Solution:

1. **Understanding Partial Pressure**:
- Partial pressure refers to the pressure exerted by an individual gas in a mixture of gases. It can also be understood as the concentration of that gas within the mixture.

2. **Diffusion of Gases**:
- The diffusion of gases occurs when there is a difference in partial pressure. Gases will move from an area of higher partial pressure to an area of lower partial pressure. This movement is driven by the concentration gradient.

3. **Application to Human Lungs**:
- In the context of human lungs, particularly in the alveoli where gas exchange occurs, the blood arriving at the alveoli has a low partial pressure of oxygen and a high partial pressure of carbon dioxide.
- Conversely, the air in the alveoli has a high partial pressure of oxygen and a low partial pressure of carbon dioxide.

4. **Gas Exchange Process**:
- When inhalation occurs, oxygen from the alveoli (high partial pressure) diffuses into the blood (low partial pressure), while carbon dioxide from the blood (high partial pressure) diffuses into the alveoli (low partial pressure) to be exhaled.

5. **Conclusion**:
- Since gases diffuse from areas of high partial pressure to areas of low partial pressure, the statement "During gaseous exchange the gases diffuse from high partial pressure to low partial pressure" is true.

### Final Answer:
**True** - During gaseous exchange, gases diffuse from high partial pressure to low partial pressure.

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