Air enters the respiratory system first through the nose or the mouth, according to the provided reference.
Pathway of Air Entry
The process involves these key steps:
- Entry Point: Air initially enters via the nose or mouth.
- Conditioning: In the nostrils, the air is warmed and moistened to prepare it for the lungs.
- Filtering: Tiny hairs called cilia filter out dust and other particles.
- Downward Journey: From the nose or mouth, air travels down a pathway towards the lungs.
| Organ | Function |
|---|---|
| Nose/Mouth | First point of entry for air into the respiratory system. |
| Nostrils | Warms, moistens and filters incoming air. |
| Cilia | Filters out dust and other particles in the nasal passages. |
| Lungs | The destination of air after it passes through the upper respiratory tract |
