THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Insect bodies have openings, called spiracles, along the thorax and abdomen. These openings connect to the tubular network, allowing oxygen to pass into the body, regulating the diffusion of CO2 and water vapor. Air enters and leaves the tracheal system through the spiracles.

Detailed explanation-2: -Spiracles are respiratory openings found on the thorax and abdomen of insects. The spiracles are connected to trachea-tubes within the insect’s body. Air enters the trachea via the spiracles and the oxygen then diffuses into the insect’s body.

Detailed explanation-3: -Respiration in insects such as cockroaches, houseflies, etc., occurs through a tracheal system. The tracheal system connects with the external environment through tiny pores on the insect’s abdomen and thorax called spiracles. A pair of spiracles are present on each body segment.

Detailed explanation-4: -Tracheas are tubes present in an insect and are the sites of gaseous exchange. Openings to these tubes are called spiracles. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue and reaches every cell of the body.