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Which of these organs belong to the respiratory system?

trachea
vein
villi
bladder

User Gligor
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2 Answers

5 votes
Trachea. (I looked it up LOL
User Nemenems
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2 votes
Answer

Trachea - a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.
User Marquise
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