. Number of spiracles in Cockroach is


A: 6 pairs

B: 8 pairs

C: 10 pairs

D: 12 pairs

Best Answer

Explanation:

  • A total of 10 pairs of spiracles are found in cockroaches.
  • Spiracles are the external openings of tracheal tubes.
  • Following are the positions of pairs found between the pleural membrane of the prothorax and mesothorax
  1. The first pair is found between the pleural membrane of the prothorax and mesothorax.
  2. The second pair is present on the pleural membranes between the mesothorax and metathorax.
  3. The third to the eighth pair is present on the pleural membrane of the first eight abdominal segments.
  4. The last two abdominal segments do not have spiracles.

Final Answer:

Hence option C: 10 pairs is the correct option.

 

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