In which part of lungs gaseous exchange takes place in human?
A. Trachea & alveolar duct
B. Trachea & bronchi
C. Alveolar duct & alveoli
D. Alveoli & Trachea
Answer:C
In which part of lungs gaseous exchange takes place in human?
A. Trachea & alveolar duct B. Trachea & bronchi C. Alveolar duct & alveoli D. Alveoli & Trachea