Which structure in human respiratory system is
involved in conditioning of air?

Options

A. Internal nares
B. Nasal chamber
C. Larynx
D. Trachea

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which structure in the human respiratory system is involved in the conditioning of air. Conditioning of air refers to the processes that make inhaled air suitable for the body.

2. **Identifying the Components of the Respiratory System**: The human respiratory system can be divided into two main parts:
- **Conducting System**: This includes structures that conduct air to the lungs (e.g., nostrils, nasal chamber, pharynx, larynx, trachea, bronchi).
- **Exchange System**: This is where gas exchange occurs (e.g., lungs and alveoli).

3. **Defining Air Conditioning**: Conditioning of air involves:
- **Temperature Regulation**: The inhaled air must be brought to body temperature.
- **Humidity**: The air must be humidified to prevent dryness in the respiratory tract.
- **Filtration**: Dust and pathogens must be filtered out to protect the internal organs.

4. **Analyzing the Options**: The options given are:
- A) Internal nerves
- B) Nasal chamber
- C) Larynx
- D) Trachea

5. **Determining the Correct Structure**:
- The **nasal chamber** is the primary structure responsible for conditioning the air. It warms, humidifies, and filters the air before it enters the lungs.
- The **larynx** and **trachea** are primarily involved in conducting air but do not significantly condition it.
- **Internal nerves** are not involved in the physical conditioning of air.

6. **Conclusion**: Based on the above analysis, the structure involved in the conditioning of air in the human respiratory system is the **nasal chamber**.

### Final Answer:
The structure involved in the conditioning of air in the human respiratory system is the **nasal chamber**.

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