Describe the respiratory system of cockroach.
The respiratory system of cockroach consists of a network of tracheae.
Tracheae open outside through 10 pairs of spiracles which are present on the lateral side of the body.
Tracheae are further divided into tracheoles which carry oxygen to all parts of the body. Exchange of gases occurs at the tracheoles by diffusion.
The openings of spiracles are regulated by the sphincters.