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Among the given options, which one represents the correct path of air or oxygen during respiration in the adult male Periplaneta americana as it enters the body of the organism?
The air enters through the spiracle in the metathorax, then moves through the trachea and tracheoles, and finally, oxygen diffuses into the cells.
The air enters through the mouth, passes through the bronchial tube and trachea, and then oxygen enters the cells.
The air enters through the spiracles in the prothorax, then moves through the tracheoles and trachea, and finally, oxygen diffuses into the cells.
The air enters through the hypopharynx, then moves through the mouth, pharynx, and trachea, and finally reaches the tissues.
Answers (1)
Option 1 represents the correct path of air or oxygen during respiration in the adult male Periplaneta americana. In this pathway, the air enters through the spiracle located in the metathorax (the hindmost segment of the thorax), then it moves through the trachea (the tubes that carry air) and tracheoles (smaller branches of the trachea), and finally, oxygen diffuses into the cells for respiration. This is the typical respiratory pathway observed in insects like Periplaneta americana. Hence, the correct answer is option 1.
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