No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Two pair in thorax and six pair in abdomen
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Two pair in thorax and eight pair in abdomen
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
Two pair in thorax and four pair in abdomen
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C Two pair in thorax and eight pair in abdomen Spiracles are the external openings containing tubules through which atmospheric air enters and escape out during gaseous exchange in cockroach and other insects. There are 20 spiracles, out of these two pairs are found in thoracic portion and rest 8 pairs are located in the abdomen region. Thoracic stigmata are somehow larger than abdominal spiracles.
So, the correct answer is 'Two pair in thorax and eight pair in abdomen'