Vital capacity of trained athlete is `"_____________"` than that of non-athletes while that of non-smokers is `"_____________"` than that of smokers.

Answer

To solve the question regarding the vital capacity of trained athletes compared to non-athletes and non-smokers compared to smokers, we can break it down into a few steps:

### Step-by-Step Solution:

1. **Understanding Vital Capacity**:
- Vital capacity is defined as the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is a crucial measure of respiratory health and is influenced by factors such as physical fitness and smoking status.

2. **Analyzing the First Comparison (Athletes vs. Non-Athletes)**:
- Trained athletes typically have a higher demand for oxygen due to their physical activities. As a result, their lungs are more efficient, and they have a greater vital capacity compared to non-athletes.
- Therefore, we can conclude that the vital capacity of trained athletes is **higher** than that of non-athletes.

3. **Analyzing the Second Comparison (Non-Smokers vs. Smokers)**:
- Smoking damages the lungs and reduces their capacity to hold air, leading to a lower vital capacity. Non-smokers, on the other hand, generally have healthier lungs and can maintain a higher vital capacity.
- Thus, the vital capacity of non-smokers is **higher** than that of smokers.

4. **Final Answer**:
- Filling in the blanks, we get:
- "Vital capacity of trained athlete is **higher** than that of non-athletes while that of non-smokers is **higher** than that of smokers."