How many spiracles does tracheal system of cockroach have?

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 1µin 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.

Parts of the tracheal system lack taenidia, facilitating the formation of air sacs which act as reservoirs of air. Insects in dry climates are able to close their spiracles and use the air sacs as a temporary air supply, thus reducing the amount of water lost to the environment. Aquatic insects use the airs sacs as buoyancy regulators as well as an underwater air supply. Moulting insects also rely on their air sacs to inflate their bodies so that they may break free of their old exoskeletons.

Answer 2

Cockroaches, like all insects, breathe through a system of tubes called tracheae. The tracheae of insects are attached to the spiracles, excluding the head. Thus cockroaches, like all insects, are not dependent on the mouth and windpipe to breathe. The valves open when the CO2 level in the insect rises to a high level; then the CO2 diffuses out of the tracheae to the outside and fresh O2 diffuses in. Unlike in vertebrates that depend on blood for transporting O2 and CO2, the tracheal system brings the air directly to cells, the tracheal tubes branching continually like a tree until their finest divisions, tracheoles, are associated with each cell, allowing gaseous oxygen to dissolve in the cytoplasm lying across the fine cuticle lining of the tracheole. CO2 diffuses out of the cell into the tracheole. While cockroaches do not have lungs and thus do not actively breathe in the vertebrate lung manner, in some very large species the body musculature may contract rhythmically to forcibly move air out and in the spiracles; this may be considered a form of breathing. [2]

Answer 3

The tracheal system of a cockroach has 10 pairs of spiracles in it. The spiracles are openings that allow air to enter the trachea or windpipe.

Answer 4

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Answer 5

The coackroach like other insects uses a system of trachea which are air filled tubes to ventilate its body and move oxygen into its body for respiration.