HORTICULTURE

Detailed explanation-1: -Insects respire through the openings in their skin or exoskeleton. These openings are called as spiracles. The air enters through spiracles and goes into internal respiratory system which is made up of densely networked array of tubes called tracheae.

Detailed explanation-2: -In elasmobranch and ganoid fishes a pair of spiracles, derived from the gills, is used as a water passageway during respiration. The nasal opening of whales and other cetaceans is called a spiracle, as is the respiratory opening behind the eyes of rays and skates.

Detailed explanation-3: -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-4: -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-5: -Spiracles are small openings present on the sides of the body of insects, like cockroaches. Spiracles help in entry and exit of gasses for respiration.