What structures occur between it and the filaments
The answer is: the alveoli.
The structures that occur between them and the capillaries during gas exchange are the alveoli, bronchi, and bronchi.
Alveoli are small air sacs located in the lungs.
These air sacs are connected to the capillaries, and through this connection oxygen is absorbed from the air into the bloodstream and carbon dioxide, a waste product, is released into the atmosphere.
The bronchi are tubes that branch out from the trachea and move air in and out of the lungs.
The bronchi, which are smaller air passages within the lungs, divide into smaller bronchioles that eventually lead to the alveoli.
Thus, by combining the alveoli, bronchi, and bronchioles, oxygen can enter the bloodstream while carbon dioxide is expelled into the atmosphere.
