The organ filled with air is the lungs.
The Lungs: Sponges of Air
Our lungs are designed to facilitate the exchange of gases, primarily oxygen and carbon dioxide. According to the provided reference, the lungs are described as looking like giant sponges, composed of numerous branching tubes that become progressively smaller.
Inside the Lungs
- Tubes: These tubes, which become finer as they branch, lead to the air sacs.
- Alveoli: The smallest structures within the lungs are the air sacs, also called alveoli. These air sacs are where the gas exchange actually happens.
| Feature | Description |
|---|---|
| Overall Shape | Sponge-like |
| Internal Structure | Thousands of branching tubes |
| Smallest Component | Alveoli (air sacs) |
| Function | Gas exchange (oxygen in, carbon dioxide out) |
The lungs’ sponge-like structure allows for a large surface area for the essential exchange of oxygen into the bloodstream, and the removal of carbon dioxide. This process is the essence of breathing and is critical for our survival. Therefore, the lungs are the primary organ filled with air.
