Parabronchi are present in__________?
Correct answer: D. birds
- A. cockroach
- B. frog
- C. fish
- D. birds
Explanation
Parabronchi are the fine respiratory passages in bird lungs, where air flows continuously and gas exchange occurs through surrounding air capillaries. Students may choose frog because frogs have lungs, but frog lungs contain larger chambers and lack the parabronchial system of birds.
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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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