Write one paragraph (at least 6 sentences) describing the path of oxygen through the respiratory system. also include why this "order of operations" is the way it is!

Explanation:

1.  First, air enters your nose which includes oxygen. The nose contains hairs because when you breathe in dust particles also enters your nose and your nose hairs stop the particles from entering your body.

    Next, oxygen enters your windpipe (aka large trachea) which is the tube that leads to your lungs. The lungs are a large pair of organs that are located in the human's chest. The lungs are very important organs because without this oxygen could have never entered our bodies to perform the process of respiration.

   Then comes the bronchi. The bronchi are large tubes that are located in our lungs. When oxygen enters your lungs oxygen goes into your bronchi which then results in the bronchi expanding.

   After the oxygen goes through the bronchi, it gets divided and moves into smaller tubes called bronchioles. There are about 30,000 bronchioles in each lung. Air from the bronchioles then goes into the alveoli which are tiny air sacks. Here, the oxygen is separated from the rest of the air inside and it moves into the capillaries. That is where the oxygen goes into the blood and carbon dioxide comes in from the blood to the lungs.

2. The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body.