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Sagot :
Answer:
trachea
Explanation:
The lower respiratory tract consists of three parts:
- Trachea
- Bronchi
- Lungs
The upper respiratory system consists of all the other ones, including:
- Nasal cavities
- Paranasal sinuses
- Pharynx, tonsils
The only one in the lower respiratory tract is the trachea, so that would be your answer.
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