Did you know… Your lungs contain almost 1500 miles of airways and over 300 million alveoli. During normal breathing, the speed that you exhale air is about 4 miles per hour. Plants are our partners in breathing. We breathe in air, use the oxygen in it, and release carbon dioxide. Plants take in carbon dioxide and release oxygen.
When your diaphragm becomes irritated, it pulls down in a jerky way, which makes you suck air into your throat suddenly. When the air rushing in hits your voice box, you're left with a big hiccup. Some things that irritate the diaphragm are eating too quickly or too much, excessive laughing, an irritation in the stomach or the throat, or feeling nervous or excited (breathing fast).
Breathing Inhalation air travels INTO lungs Exhalation air pushed OUT OF lungs Involves the diaphragm & rib cage muscles
Brain MEDULLA –Detects the level of CO 2 in the blood
Let’s summarize…: 1.Where does gas exchange occur? 2.Describe the process of gas exchange. 3.Which way does the diaphragm move during inhalation? During exhalation? 4.What happens to pressure in the chest cavity during inhalation? During exhalation? 5.Which gas regulates breathing rate?