🔬 Science · The Human Body
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
Typical age: 9–11 years
“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?”
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