Air Sacs of The Lungs

 Where is the air that you breathe in going through? Well the air that you breathe in goes to your body but the air that you breathe in goes to a certain part of your body and that part of your body is called the air sacs. Air sacs are these thin walls in your body. Air sacs are like little holes in a sponge and those holes are filled up with air because when you breathe in the air travels really fast and goes to your air sacs into the holes in your air sacs then goes to every cell in your body. They are also covered up with millions and millions of capillaries. Capillaries are not apart of the respiratory system capillaries are apart of the circulatory system. Did you know why air sacs are called air sacs well an air sac is called an air sac because there is air in the holes and they are in a sac covered up in capillaries, but maybe thats why they are called air sacs. But did you know that air sacs are the tiniest tubes in your lungs and air sacs are like these little tiny balloons too. Also the air that you breathe in goes from your lungs so fast to your air sacs and then to your blood, but why does the oxygen air go to the blood? Well your air goes to your blood because your blood needs oxygen so you can live.Even there are names for some of your air sacs and one of the names of your air sac are called  Alveoli's. But is air sacs the only place your air that you breath in can go through?

But is that the only place your air can go through.