Question

explain tracheal system in cockroach

Answer 1

The tracheal system of an insect is a complex network of tubes (tracheae) which divide and subdivide into tubes of decreasing diameter. The tracheae eventually branch into microscopic tubes, tracheoles, which are less than 1µ in diameter and penetrate each cell of the body.

The tracheae are epidermal in origin (when an insect moults, the shed exoskeleton sometimes includes old tracheae because it is continuous with the cuticle). Each tracheal tube is lined with a thin strip of cuticle (called taenidia) that winds spirally through the membranous wall. This cuticular reinforcement of the tracheae prevents the collapse of the tracheal walls and also enables each tube to flex and stretch without restricting air flow.

Answer 2

cheal System of a Cockroach. The tracheal system of an insect is a complex network of tubes (tracheae) which divide and subdivide into tubes of decreasing diameter. The tracheae eventually branch into microscopic tubes, tracheoles, which are less than 1µ in diameter and penetrate each cell of the body.