It s strange, why did the cockroach fall to death on the ground for no reason?

It could be natural death and drug poisoning.

Most of them look similar, but a closer look reveals the difference. Current taxonomists classify cockroaches into about 6,000 species, of which about 50 are pests.

For example, the commonly known Asian cockroach. In addition, the American cockroach (American cockroach.

German cockroach (German cockroach.

Brown cockroaches and Australian.

Cockroaches are also widely distributed.

One of the characteristics of the cockroach life history is the long cycle. In the case of the German cockroach with the shortest cycle, it generally takes more than 2 months to complete a generation, and the longest American cockroach takes more than 1 year. The length of life history varies not only from species to species, but also with different conditions such as temperature, nutrition, etc.

The adult worm also has a long lifespan, the shortest German cockroach is about 100 days, and the longest-lived American cockroach can survive for up to 1 year. The length of life also varies depending on the type and environmental conditions.

Cockroaches have a long life cycle and they also have a long lifespan. Therefore, a fertilized female cockroach produces a large number of egg sheaths in her lifetime, and the American cockroach can produce more than 50 at most, so the cockroach is very fecund.

With the exception of cockroaches, many insects die with their abdomen facing up. The feet of the cockroach itself are contracted under the body at ordinary times, so as to form a relatively large chassis, which is conducive to the downward movement of the center of gravity, and the feet of the cockroach are dry after death, because the angle of extension of the ligament contraction will be relatively large, that is, it will stretch relatively straight, which directly leads to the center of gravity in the upper part of the entire façade, which is the reason why it is easier for the cockroach to turn over after death, and the reason why it is not easy to turn back after turning over is because the back of the cockroach is semi-arc, no matter which direction the force pushes, will produce an opposite corresponding stress, the magnitude of this force is proportional to the magnitude of the propulsive force, and the semi-arc structure is also conducive to the smooth over-smoothing of the object on the surface of the object when it is pushed by the propulsive force, and it is not easy to produce resistance to cause rollover———.

<> weightlessness. Before the cockroach dies, the motor nerve will be out of balance, shaking, tilting and struggling, coupled with the heavy back and light abdomen, it is easy to lose the center of gravity, showing "six feet to the sky", that is, "belly turning phenomenon". Because the cockroach's stomata are in the abdomen, and cockroaches breathe through the stomata in the abdomen, the insecticide oil will cover the cockroach's stomata so that the cockroach cannot breathe until it dies.

It's the same as when a person is about to suffocate in the water, he struggles to swim out of the water to get more air. The back of the cockroach is harder and heavier, which is used to protect the place, and the abdomen is more fragile, although it is relatively light, when the cockroach dies, the whole hand and foot will be struggling, the body will continue to move around, and finally because of the heavy back and light abdomen, and the center of gravity will be unstable.

The reason why cockroaches turn over after death is because of their body structure and physiological characteristics. Cockroaches have an organ called the dorsal ganglia, which is located at the end of the abdomen and is responsible for controlling the movement of cockroaches. When the cockroach dies, the dorsal ganglion stops working, causing the abdominal muscles to lose support and unable to maintain body balance, so they flip over.

Structural logic:1Get straight to the point.

2.Introduce the structural characteristics of cockroaches. 3.

After the death of the cockroach, the dorsal ganglion stops working, causing the abdominal muscles to lose support. 4.Further explain why loss of support from the abs can cause the cockroach to flip.

5.Summarize the content of the extension. Further Introduction:

Cockroaches have a very special body structure and biological characteristics. Not only do they have a very tough shell, but they also possess the ability to repair themselves, which is one of the reasons why they are so difficult to kill. In addition, cockroaches also have an interesting feature that they can survive despite a heavy head hit, which is one of the reasons why many scientists study cockroaches.

To sum up, cockroaches flip after death due to the influence of body structure and physiological characteristics. More in-depth research has shown that these properties not only make them extremely resilient and viable, but also pose a great threat to human health.

Therefore, we should strengthen environmental hygiene management to reduce the chance of cockroach breeding to protect human health and consumption.