How the Lungs Work
Explain how the respiratory system works in detail: air travels through the nose/mouth, down the trachea, into bronchi and bronchioles, reaching tiny air sacs (alveoli) in the lungs where oxygen passes into the blood and carbon dioxide passes out
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Check understanding
- Trace the air pathway: nose/mouth → trachea → bronchi → bronchioles → alveoli
- Explain gas exchange in the alveoli: oxygen passes into blood capillaries, carbon dioxide passes out
- Describe the mechanical process: the diaphragm contracts to pull air in and relaxes to push air out
“Can your child describe what happens to the air they breathe in — how it travels deeper and deeper into the lungs until oxygen swaps into the blood?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- The Human Body
- Age range
- Ages 9–11