Text|Science Wormhole
A video circulated widely on the Internet, the protagonist is a fly, but the content is a bit scary: the fly rubbing his hands, rubbing his head, actually rubbed his head off It makes people dumbfounded on the spot.
Many netizens suspected that it was the photographer's self-directed and self-acted performance, who artificially took off the head of the fly to sensationalize, but in fact, it is really possible for the fly to twist its head off. So why do flies do this, and how long can they live after losing their heads?
has a short lifespan, but can grow
Flies are one of the most hated insects of humans, especially in summer. If you are not paying attention, you will be surrounded by the buzzing of flies and food will be contaminated by them.
The feeding habits of flies are very complex, with different types and different food preferences. Some like to suck nectar and plant juice; some eat human and animal blood and eye and nose secretions.
The housefly commonly found in our lives is omnivorous. It eats not only human food, but also animal secretions and excrement, organic matter in garbage, etc., like sugar, vinegar, fishy smell and many more.
The way flies walk is very special. We all know that "triangles are the most stable structure", and they seem to understand this.
A fly has 6 legs. When walking, the front and back feet on one side will form a "triangle" with the midfoot on the other side.A total of 2 groups of "triangles" are formed.
In this way, when one group of "triangles" step forward, the remaining group can maintain the balance of the body.
The life span of flies is very short, only has about one month from birth to death. However, they can lay a large number of eggs in a limited time, and their reproductive ability is terrible.
is different from other animals that mate and produce once. The flies can lay eggs for life once they mate, which is an important reason for their strong reproductive ability.
It is understood that the housefly in the laboratory, a female fly can lay 600-1000 eggs in a lifetime; in nature, a female fly also lays 400-600 eggs. .
Generally speaking, house flies can reproduce 10-12 generations a year. According to conservative estimates, if has 100 mated female flies, each lays 200 eggs, and only 10 generations, the total number of newborn flies born can reach at least 2 trillion.
From this we can see how terrible the flies are. Their life is very short, so the growth process is like speeding up. only needs 7-14 days from egg development to adult .
Why do flies "rub their hands"?
For this kind of pest that is very close to our lives, many people have more or less observed it, and it is not difficult to find. Flies like "rubbing hands" very much, and even "flies rubbing hands" has become a popular vocabulary on the Internet.
So, why do flies rub their hands? The reason why humans rub their hands is usually because they feel cold and want to warm their hands through friction and heat.
The flies rubbing hands are not for this reason. They not only rub their hands, but also rub their bodies, including their heads. This is related to their body structure.
The feet of flies are covered with dense fluff. These foot hairs can help them stay on food and other objects, but they also have certain "side effects": food residues, dust and other things will stick to it. .
You should know that the average weight of flies is only a few dozen milligrams, and these substances on the foot hair will obviously increase their weight. As a result, their flight will be affected.
Therefore, flies are actually cleaning themselves. In addition to reducing the burden of flying, this method can also maintain the sensitivity of taste.
The taste organs of flies do not grow on the head like we do, but on the feet. They rely on the taste receptors on their feet to find food, taste the taste, and then eat.
In addition,Scientists also discovered other intentions of the flies rubbing their hands. During the courtship phase, they will rub their hands more frequently. is likely to release courtship information. In summary, flies often "rub their hands and hands", which is conducive to their lives and reproduction.
Why would you twist your head to play?
Just rub your hands, why do you screw off your head? This is not a fun thing. Except for the few creatures that light up the resurrection skills, most creatures die soon after losing their heads.
Scientists have discovered a kind of sea slug, which can still move after the head is disconnected from the body, and the neck wound is healed in one day; a week later, the head grows out of the heart; 20 days later, it is basically A whole new body has grown.
However, most creatures, including flies, do not possess such magical abilities. So why should the fly find its own way?
In fact, is the same as rubbing the head and the hands and feet in the flies. As long as they are stained with food residues and dust, they will reflexively "rubbing" and will It's cleaned up.
Their behavior is not controlled by the brain like humans, and they can't judge the danger of "rubbing their heads". Sometimes they just twist their heads off.
and after the head is removed,The flies rubbing their hands did not stop immediately. This shows that "twisting the head down" is an accident caused by rubbing hands, and it also means that they will not die immediately after the head is severed.
So, how long can headless flies live? The answer is simple, it depends on how long they can carry the hunger. The head, mouth, and body of the fly are controlled by different central nervous system .
After decapitation, the body of the fly can also perform motor and sensory functions. In addition, the flies are arthropods , and the blood circulation is open-tube circulation , so decapitation will not cause major bleeding.
With such a body structure, flies without a head still retain the ability to move. Of course, they cannot die. Because of the loss of the head, the flies cannot eat, so the end result is often starvation.
Finally, I remind everyone that it is best to clean the food that the flies have stayed on, and do not eat the food they have been. Because you don't know what they ate in the last meal, it may be human food, or it may be feces or garbage.
Moreover, they are also a kind of creature that can eat and pull. Living habits cause flies to carry and infect germs. In order to prevent disease, it is still necessary to pay attention to flies.
————————————
The picture in this article is from the Internet,If there is any infringement, please contact delete
.
