Cockroaches are one of the famous "Four Hazards". Most people hate cockroaches, especially the big cockroaches in the south. Some people even feel scared, nauseated, and disgusted with cockroaches.
The first reaction when we saw cockroaches was to pick up slippers and wait on them, so we refused to learn more about this pesky insect. In fact, there are many unique features of cockroaches, so we might as well take a look.
10. Cockroaches are edible
Cockroaches have high protein content and are a healthy food. But for most people, this food is disgusting, because everyone wants to stay away from cockroaches as much as possible instead of putting them in their mouths. In the cognition of most people, cockroaches usually live in dirty places such as sewers and naturally cannot make food. However, when they are bred in a safe environment, they are safe to eat.
There are many cockroach breeding bases in our country. In the breeding bases, cockroaches are fed with fresh vegetables and fresh fruits. The cockroaches cultivated in this environment are actually very fresh, clean and delicious. Cockroaches can be cooked by fried, fried, boiled or roasted. It tastes and textures like chicken.
9. Flying cockroaches
There are more than 3,500 kinds of cockroaches in the world. And most of them have wings. But not all cockroaches have the ability to fly. In fact, the brown-banded cockroach is the only cockroach known to fly. In the south of our country, the big and flying cockroach is this kind of cockroach. Cockroaches are cold-blooded animals. When the temperature rises, they become more active. They may start flying around to find a new home. However, other cockroaches only use their wings for short gliding and flapping in search of food and water, or use their wings to maintain balance when jumping from a high place to a lower surface.
Flying cockroaches are more likely to bring danger to humans. Although cockroaches bite people are rare, the main danger they bring to humans is to carry pathogens and spread diseases. For example, they can carry bacteria such as Salmonella and other diseases,Then they were taken to crawl over food, causing human food poisoning. Because cockroaches fly slowly, they are easy targets for birds or bats. So even if they can fly, they prefer to use more efficient legs to move instead of flying.
8. Can survive a nuclear explosion
Cockroaches have a higher radiation survival rate than humans. This was verified in the Hiroshima and Nagasaki incidents in 1945.
In subsequent experiments, it was found that although cockroaches cannot survive at level 3 radiation, they can indeed withstand higher levels of radiation. According to investigations, 10% of cockroaches can survive exposure to 1000 rads (radon units), but their reproductive ability may decrease.
7. Cockroaches can communicate with each other
Cockroaches can communicate with each other through the foraging pheromones released from their internal organs. Interestingly, Madagascar hissing cockroaches have a unique way of producing hissing noise. This cockroach produces sound by forcibly expelling air through the air holes of the respiratory system. Because the stomata are involved in breathing, this method of vocalization is a typical feature of vertebrate breath sounds. This hissing sound is used to express aggression, especially when fighting or expressing emotions during mating.
6. Cockroaches fart
Cockroaches fart more than any insect in the world. Cockroaches can produce methane through the respiratory tract, and the gas produced as a byproduct of digestion is absorbed into the insect's hemolymph-its blood-and then released through its stomata. Generally all animals that consume a lot of fiber food have this habit, but relative to their body weight, cockroaches emit a greater proportion of methane than any other insect.
A 2012 study found that American cockroaches are the most fart animal, releasing up to 35 grams of methane each year, which is 45 times their actual body weight. Even after death, they can release methane within 20 hours, so cockroaches are one of the main culprits of global warming.
5. Headless cockroaches
A distinctive feature of cockroaches is that they can live for several weeks even if their heads are chopped off. This fact is really incredible. When the cockroach is decapitated, the cockroach's circulatory system condenses at the neck, and the rest of the body continues to circulate continuously. The reason is that cockroaches do not breathe with their head, but with their stomata. In other words, even after being decapitated, its body parts will continue to receive oxygen. What is even more incredible is that cockroaches do not rely on brain coordination, but independent muscle control, which is why they can live for several weeks after being decapitated. Even if they died a few weeks later, it was not because of being beheaded, but because they had no mouth to eat. They eventually died of starvation or dehydration. In fact, not only the body, but also the severed head can continue to operate for several hours.
4. Cockroaches are older than dinosaurs
According to archaeological findings, cockroaches are actually older than dinosaurs. The oldest known cockroach survived an asteroid attack, but the dinosaurs went extinct. The fossils of the ancestors of cockroaches can be traced back to about 300 million years ago, when cockroaches had just crawled from the water to land. According to scientists, the body structure of cockroaches at that time was more or less similar to modern cockroaches, which once again confirmed that they were the earth. One of the oldest creatures on the planet.
3. Cockroach death is usually due to the back
The back of the cockroach is slightly round and greasy, the body is flat, and the legs are very long. These long legs give them a higher center of gravity, which means they put most of their weight on their back. When the cockroach gets old, its center of gravity will slowly shift downwards. Its heavy back and weak muscles prevent it from returning to its original state, and it will eventually get close to the floor and cannot crawl until it dies.
2. Cockroaches can make people allergic
Cockroaches release a protein from the body,This can cause allergic reactions. Cockroach allergy is a serious health problem. Humans may have allergic reactions to the saliva, excreta and dead bodies of cockroaches. Asthma patients have a higher risk of this allergy . The main symptoms of allergies include skin rash, cough, wheezing and difficulty breathing, runny nose, and itchy eyes.
1. Cockroaches can pass through ultra-narrow gaps
Cockroaches can squeeze themselves through the smallest cracks. With the help of their amazingly flexible exoskeleton, cockroaches can pass through a hole as small as a quarter of their body height by flattening their flexible exoskeleton and spreading its legs to one side.
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