ok, think of your lungs as a cluster of grapes hanging upside down. The smallest branches are called bronchioles . At the end of each bronchiole is an "air sac" called alveoli .
Your question is unclear. Are you asking what does the most in the respiratory system , then tiny little sacs called the alveoli do.
Cilia are the tiny hairs that sweep dust and dirt out of the respiratory system.
some things that are part of the lungs and respiratory system
The insect respiratory system operates by passive exchange of gasses through tiny holes called spiracles in their abdomen.
alveoli
Cilia are tiny hair-like projections from the apical cells of the respiratory system. They beat in an upward direction to push mucous and any trapped substances out of the lungs.
Some of the components of the respiratory system are the major structures like the throat, windpipe, and lungs. The other parts are smaller things like the alveoli, which are tiny sacs in the lungs where over a million of them work to transfer oxygen and carbon dioxide in and out of blood.
alveolus (tiny air sacs arranged in clusters in the lungs, in which the exchange of oxygen and carbon dioxide takes place.)
"Our solar system." The "part of our galaxy" that's in our solar system is the solar system.
As you breathe through your nose, it will go through the windpipe and into your lungs. It will go through tiny holes in the lungs. The wastes will get out from the tiny holes into your windpipe and you breathe them out.
Aveoli
alveoil