Multiple choice general knowledge science & technology

Which of the following has air sacs, a unique anatomical respiratory feature?

  1. Fish

  2. Birds

  3. Elephant

  4. Frogs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Birds possess air sacs as a unique anatomical feature of their respiratory system. These air sacs allow for unidirectional airflow through the lungs, enabling efficient gas exchange even during both inhalation and exhalation. This adaptation supports the high metabolic demands of flight. Fish use gills, elephants have mammalian lungs, and frogs primarily use cutaneous and buccopharyngeal respiration.

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