Question

describe the tracheal respiration giving example

Answer 1

hlo 
tracheal respiration is the respiration by trachea we can take example of human being

Answer 2

Insects, and some other invertebrates, exchange oxygen and carbon dioxide between their tissues and the air by a system of air-filled tubes called tracheae.

Tracheae open to the outside through small holes called spiracles. In the grasshopper, the first and third segments of the thorax have a spiracle on each side. Another 8 pairs of spiracles are arranged in a line on either side of the abdomen.

The spiracles are guarded byvalves controlled by muscles that enables the grasshopper to open and close them;hairs that filter out dust as the air enters the spiracles.

Spiracles open into large tracheal tubes. These, in turn, lead to ever-finer branches. The branches penetrate to every part of the body. At their extreme ends, called tracheoles, they may be less than 1 µm in diameter. Every cell in the insect's body is adjacent to, or very close to, the end of a tracheole. In some of the flight muscles of Drosophila the tracheoles even penetrate their T-tubules bringing oxygen right next to the mitochondria that power the muscle.

This photomicrograph show how the walls of the tracheal tubes are stiffened with bands of chitin. Even so, there is a limit to the pressure they can withstand without collapsing. This may be one reason why insects are relatively small. The increased weight of the tissues of an animal the size of a rabbit, for example, would crush tracheal tubes filled only with air.