Well Bill, I'm gonna be the spirit that will answer your question. Lets get started then.
On this casual Saturday afternoon, Bill was going on a casual stroll in downtown. While walking Bill thought to himself "what happens when I breath?".
Where the respiratory center is located.
Suddenly, Bill was face to face with a ghost!
So the spirit runs through the process of breathing with Bill. The spirit explains that when you inhaling,your nose/mouth oxygen from air gets inhaled through the nose/mouth then goes down the trachea-or the windpipe- into the lungs.
The respiratory center helps control the rate of breathing, the center is located in the brain. Then the lung stretch receptors are activated and make the lugs move. When the oxygen goes down the Trachea and into the lungs. When in the lungs the oxygen moves into each lung. "Isn't that it?" asks Bill. "NO! Were only just getting started." replied the spirit.
"What is that on the end there?" asks Bill, "It looks like a cherry."."Hey, were on a strict budget-thanks cartoonist-,anyway that is the aveolis. While the rate of ventilation changes the chemorecpters sends a signal to the respiratory center and makes changes to the blood acidity and pH. But will get to that later,