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Question

Cockroaches have a separate respiratory system called tracheal system which consists of a series of tubes called trachea which open into small apertures called as ___.


Your Answer
A
ostia
Your Answer
B
dorsal pores
Your Answer
C
ventral pores
Correct Answer
D
spiracles

Solution

The correct option is C spiracles
Cockroach and other insects have small openings on the sides of their body. These openings are called spiracles. Insects have a network of air tubes called trachea for gas exchange. 
Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue and reaches every cell of the body.

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