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Oxygen binds haemoglobin in the lungs and leaves it at the:
AAlveoli
BNostrils
CBronchi
DTissues
Answer & Solution
Correct answer: D. Tissues
1. In the lungs oxygen pressure is high, so oxygen binds.
2. In tissues oxygen pressure is low and carbon dioxide is high.
3. So oxygen is released at the tissues.
_Source: NCERT Class 11 Biology, Chapter 17, Breathing and Exchange of Gases._
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