The maximum amount of air that our lung can normally hold is

Options

A. (a) vital capacity
B. (b) tidal capacity
C. (c) total lung capacity
D. (d) pulmonary capacity

Answer

To determine the maximum amount of air that our lungs can normally hold, we need to understand the different capacities of the lungs. Here's a step-by-step breakdown of the solution:

### Step 1: Understand the Options
The question provides several options related to lung capacities:
- A) Vital Capacity
- B) Tidal Capacity
- C) Total Lung Capacity
- D) Pulmonary Capacity

### Step 2: Define Each Capacity
1. **Vital Capacity (A)**: This is the maximum amount of air that can be exhaled after a maximum inhalation. It represents the air that can be actively exchanged during breathing.

2. **Tidal Capacity (B)**: This refers to the amount of air inhaled or exhaled in a single breath during normal breathing. It is typically much smaller than the total lung capacity.

3. **Total Lung Capacity (C)**: This is the total volume of air that the lungs can hold after a maximum inhalation. It includes all the air in the lungs, including the air that cannot be expelled (residual volume).

4. **Pulmonary Capacity (D)**: This term encompasses all lung volumes and capacities but is not a specific measurement of maximum air capacity.

### Step 3: Identify the Correct Answer
The question asks for the maximum amount of air that our lungs can normally hold. The most appropriate term for this is **Total Lung Capacity (C)**, as it includes the vital capacity plus the residual volume (the air remaining in the lungs after forceful expiration).

### Conclusion
The correct answer to the question is **C) Total Lung Capacity**, which is typically around 5 to 6 liters.

---