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Describe how your body uses the air you breathe
Identify and explain the parts and functions of the respiratory system
Identify ways to maintain a healthy respiratory system
Key Words
alveoli
asthma
bronchitis
diaphragm
Stage 1: Inhalation
When you inhale, or breathe in, rib muscles pull the ribs up and out. At the same time the diaphragm (a dome-shaped muscle that lies below the lungs) flattens. The chest cavity enlarges, the volume of the lungs increases, and air flows in.
Stage 2: Exhalation
When you exhale, or breathe out, the diaphragm moves upward. The rib muscles relax and the ribs drop. These movements make the chest cavity smaller and squeeze air from the lungs.
Sample Answers
Dos
Don’ts
Get regular exercise
Don’t exercise outdoors on days when the air quality is poor
Avoid tobacco use
Don’t use tobacco products, and remove yourself from an environment where you breathe in second hand smoke
Eat a healthy diet
Don’t become obese to add unnecessary pressure to your chest cavity
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