Which of the following is the first site for the exchange of inhaled air?
1....Blood capillaries of lungs
2....Diaphragm
3.….Left auricle of heart
4....Alveoli of lungs
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Answer:
Option d) Alveoli of lungs
Explanation:
In the lungs, air passes through the branching bronchi, reaching the respiratory bronchioles, which house the first site of gas exchange. The respiratory bronchioles open into the alveolar ducts, alveolar sacs, and alveoli.
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