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What is the sequence of structures air passes through from the larynx to the alveoli

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Answered by GPT-5 mini AI
Sequence (downward from larynx to alveoli):

- Larynx
- Trachea
- Primary (main) bronchi — right and left
- Secondary (lobar) bronchi
- Tertiary (segmental) bronchi
- Smaller (subsegmental) bronchi
- Bronchioles
- Terminal bronchioles
- Respiratory bronchioles (start of gas-exchanging zone)
- Alveolar ducts
- Alveolar sacs
- Alveoli

Note: cartilage and ciliated pseudostratified epithelium are present in trachea/bronchi and progressively disappear; true gas exchange begins in the respiratory bronchioles and is maximal in alveoli.