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Alveoli

Alveoli pulmonis · Plicní sklípky

Respiratory system

Looks like

Some 300 million thin-walled bubbles at the end of the airways, each wrapped in capillaries.

What it does

Where oxygen crosses into the blood and carbon dioxide leaves it.

Keeping it well

Never smoke; smoke, dust and fumes destroy these walls and they do not grow back.

Its parts

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