Which of the following animals has a respiratory system with one way flow of the air through the lungs, and the air is renewed after inspiration?
Correct answer: C. Aves
- A. Cockroach
- B. Earthworm
- C. Aves
- D. Frogs
Explanation
Birds have a unidirectional respiratory system in which air sacs drive air through the parabronchi during both inhalation and exhalation. This keeps fresh air moving across the respiratory surfaces and makes gas exchange highly efficient. Students may choose cockroach because it also has a specialised respiratory system, but cockroach tracheae do not produce the bird-like one-way lung flow.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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