Which is the correct sequence of air passage during inhalation ?

Options

A. nasal caity `rarr` pharynx `rarr` trachea `rarr` larynx `rarr` bronchi `rarr` bronchioles `rarr` alveoli
B. nasal cavity `rarr` pharynx `rarr` larynx `rarr` trachea `rarr` bronchi `rarr` bronchiloes `rarr` alveoli
C. nasal vacity `rarr` larynx `rarr` pharynx `rarr` trachea `rarr` bronchi `rarr` bornchiloes `rarr` alveoli
D. nasal vacity `rarr` larynx `rarr` bronchi `rarr` pharynx `rarr` trachea `rarr` bronchiloies `rarr` alveoli

Answer

To determine the correct sequence of air passage during inhalation, we need to follow the pathway that air takes as it enters the respiratory system. Here is the step-by-step solution:

### Step-by-Step Solution:

1. **Nasal Cavity**: The process begins when air is inhaled through the nostrils, which leads to the nasal cavity. The nasal cavity warms, moistens, and filters the air.

2. **Pharynx**: From the nasal cavity, the air moves into the pharynx. The pharynx has three parts: nasopharynx, oropharynx, and laryngopharynx. The air passes through this region next.

3. **Larynx**: After the pharynx, the air then enters the larynx. The larynx is located above the trachea and is responsible for sound production as well as protecting the airway during swallowing.

4. **Trachea**: The air continues down into the trachea, commonly known as the windpipe. The trachea serves as the main airway that directs air into the lungs.

5. **Bronchi**: From the trachea, the air travels into the bronchi, which are the two main branches that lead into each lung.

6. **Bronchioles**: The bronchi further divide into smaller tubes called bronchioles, which spread throughout the lungs.

7. **Alveoli**: Finally, the air reaches the alveoli, which are tiny air sacs where the exchange of gases (oxygen and carbon dioxide) occurs.

### Correct Sequence:
Nasal Cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

### Conclusion:
The correct sequence of air passage during inhalation is: **Nasal Cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli**.