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  • How is the exchange of gases facilitated in the cockroach?Option: 1 Through contractionOption: 2</stron

How is the exchange of gases facilitated in the cockroach?

Option: 1

Through contraction


Option: 2

Through diffusion


Option: 3

Through pressure


Option: 4

All of these

 


Answers (1)

best_answer

Respiratory System and Excretory System of Cockroach

Respiratory system

  • Respiratory system of cockroach includes a system of tubes or tracheae.
  • These tracheae receives air through 10 pairs of small openings called spiracles.
  • The spiracles are located on the lateral sides of the body of insect.
  • Each trachea divides into thin branches called tracheoles which carry oxygen from the air to all the parts of the body.
  • The openings of the spiracles are regulated by the sphincters. 
  • The exchange of gases takes place at the tracheoles by diffusion
  • Out of the ten, the 1st and 3rd pair of spiracles always remain open, while the rest of them open only during inspiration. 
  • The process of respiration is associated with the contraction and relaxation of abdominal muscles called tergo-sternal muscle.
     

 

The exchange of gases takes place at the tracheoles by diffusion

Posted by

Devendra Khairwa

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