Respiratory Adaptations: Altitude and Diving · NCERT Biology

Which adaptation helps birds flying at high altitudes obtain sufficient oxygen?

  1. Reduced lung size
  2. Presence of air sacs
  3. Lower hemoglobin affinity
  4. Thicker blood plasma
Show answer and explanation

Correct answer: Presence of air sacs

Air sacs allow continuous airflow through lungs. This enhances oxygen uptake even at high altitudes.

Difficulty: Medium Question 18 of 20

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