Mechanism of Breathing · NCERT Biology

The average breathing rate of a healthy human adult is:

  1. 70-80 times/minute
  2. 5-10 times/minute
  3. 12-16 times/minute
  4. 20-25 times/minute
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Correct answer: 12-16 times/minute

A healthy human adult breathes approximately 12 to 16 times per minute under normal physiological conditions. This rate can increase significantly during physical exertion.

Difficulty: Medium Question 11 of 20

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