What is the primary respiration organ of birds?

What is the primary respiration organ of birds?

• A. Lungs
• B. Gills
• C. Skin
• D. Trachea

Answer: (A)

The lungs are the primary respiration organ. In birds, gas exchange happens in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses out. Birds have a highly efficient system with rigid lungs containing parabronchi, plus a network of air sacs that move air through the lungs during both inhalation and exhalation. This setup provides a continuous flow of fresh air, supporting their high metabolic demands during flight. Gills are used by aquatic animals, not birds. The skin in birds isn’t a respiratory surface. The trachea is the airway that carries air to the lungs, but it’s not where gas exchange occurs.

The lungs are the primary respiration organ. In birds, gas exchange happens in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses out. Birds have a highly efficient system with rigid lungs containing parabronchi, plus a network of air sacs that move air through the lungs during both inhalation and exhalation. This setup provides a continuous flow of fresh air, supporting their high metabolic demands during flight.

Gills are used by aquatic animals, not birds. The skin in birds isn’t a respiratory surface. The trachea is the airway that carries air to the lungs, but it’s not where gas exchange occurs.