Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Biology Human body

The exchange of respiratory gases in the lungs occur in-

1

Trachea

2

Alveoli

3

Bronchi

4

More than one of the above

5

None of the above

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