The respiratory or exchange part of the respiratory system is formed by

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Solution

The respiratory part

The respiratory part- The parts that provide for the exchange of respiratory gases is called respiratory parts.

The alveoli and its ducts form the respiratory part.

Final answer
D. Alveoli and duct of alveoli

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The respiratory system performs the function of gaseous exchange. This exchange of gases occurs in the Air sac or Bronchus.

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