Whether insects breathe with valves or not, and whether insects all breathe with trachea

*Yes, insects mainly use valves for breathing**. The valve is a small circular hole on the sides of the insect's chest and abdomen that connects to the trachea. Insects rely on the opening and contraction of their abdomen to breathe through the valves and trachea.

The number and position of the valves may vary from insect to insect, but they are generally located on both sides of the abdomen, appearing in pairs, and have a function of opening and exhaling to control the intake and exhalation of oxygen.

A: No, it is not.

For insects, the way of breathing is extremely strange and interesting. If we look closely at the abdomen of an insect, which is the belly, we will see a large number of small openings, called valves. Each valve is an inlet for a catheter.

This tube functions in the same way as the trachea that a person breathes. So insects breathe the same way we breathe, except that insects have hundreds of trachea in their stomachs to bring in air. For a creature as small as an insect, these pipes don't take up much space.

But can you imagine that the human respiratory system is like the respiratory system of insects? Then there is almost no room for the other organs!

Some insects do not have a tracheal system, or the tracheal system is very imperfect, and the exchange of gases is carried out directly through the body wall, which is called body wall respiration. For example, the vast majority of species in the order Springtail do not have a tracheal system; The larvae of many parasitic insects, although there is a gas pipe system in the body, but there is no valve, and the whole body is immersed in the host's body fluids or tissue fluids, and generally the soft body wall is mostly used to absorb oxygen dissolved in the host's blood; Although some aquatic insects have a complete tracheal system in their bodies, they often do not have special breathing mechanisms on the body wall, and can use the body wall to absorb oxygen dissolved in water.

Breathing through the tracheal system: Most terrestrial insects breathe through the tracheal system, relying on the ventilation and diffusion of the tracheal system to directly absorb oxygen from the atmosphere and excrete carbon dioxide from various tissues in the body. Breathe with the body wall:

Some insects have no or only an incomplete tracheal system, and gas exchange occurs directly through the body wall, such as springtails. Breathing with tracheal gills: The juvenile stage of insects such as mayflies, cocooptera, and hairyoptera live in water, and part of their body wall protrudes into a thin or filamentous structure called tracheal gills, which uses the partial pressure difference between tracheal gills and oxygen to take in oxygen.

1. Breathing with the tracheal system: Most terrestrial insects breathe through the tracheal system, relying on the ventilation and diffusion of the tracheal system to directly absorb oxygen from the atmosphere and discharge carbon dioxide from various tissues in the body.

2. Respiration through the body wall: Some insects do not have or only have an incomplete tracheal system, and gas exchange is carried out directly through the body wall, such as springtail insects.

3. Breathing with tracheal gills: the juvenile life of insects such as mayflies, poptera, and hairyoptera lives in water, and part of their body wall protrudes into a thin sheet or filamentous structure called tracheal gills, and uses the partial pressure difference between tracheal gills and oxygen to absorb oxygen.

4. Respiration with snorkels, air films, and bubbles: the valves of some aquatic insects in the juvenile or adult stages are reduced, and a long snorkel is often formed at the end of the abdomen, with a valve opening on it, and oil is secreted around the valve or there are water-repellent hairs to break the surface tension of the water and absorb the air on the water surface. Such as rat maggots, water fly larvae, mosquito larvae, scorpion bugs and opossum bugs.

5. Breathing mode of parasitic insects: similar to the breathing mode of aquatic insects, parasitic insects rely on the osmosis of the body wall to absorb oxygen from the host fluid or tissue, or penetrate the host wall with the valve to obtain oxygen from the atmosphere.

<> locusts do not breathe through the valves. The valve is a row of small holes arranged neatly on the left and right sides of the locust's abdomen, which is the gateway for gas to enter and exit the locust's body, and the trachea bridge is the place for gas start and elimination signal exchange.