It is a very old creature on earth, with special blue blood and three hearts

The earth is a beautiful blue planet with rich species. In this life planet, besides intelligent human beings, there are more than millions of species. However, most of the creatures were born after the fifth mass extinction. The ancient species that can really survive hundreds of millions of years ago are very rare.

Dinosaurs extinct 65 million years ago can be said to be very old creatures on the earth at that time. They may have been born more than 200 million years ago. After their birth, dinosaurs soon became the overlord of the earth. Unfortunately, they were extinct due to an asteroid impact. So are there any ancient creatures on earth that can continue to the present? The answer is yes.

Today, we introduce a crab like creature, which has developed from the Ordovician period more than 400 million years ago to the present ancient creature. Its name is horseshoe crab. Many people may not have heard of this ancient creature, because it is not delicious and has not become the food on people’s table.

Tachypleus amebocyte is a marine arthropod belonging to the order sword tail of the class limbus. Its shape is similar to a crab. Its body is bluish brown or dark brown, and it has a hard shell. It has four eyes, two of which are compound eyes, which can make the image of the object clearer. Tachypleus amebocyte is the most sensitive to ultraviolet light. It can only sense brightness. It can push its body to swim by clapping its gills back down. It can also drill into the soil, bend its body into a bow, and then push its body forward with its tail sword and the last pair of feet.

Tachypleus amebocyte first appeared in the Ordovician period 400 million years ago. It is related to trilobites and other creatures. It can be said that it is the oldest creature found on the earth at present. Its appearance has a very obvious feature, that is, it has a slender tail like a long needle.

Maybe many people don’t understand why Tachypleus can last hundreds of millions of years without extinction? You know, the earth has experienced many mass extinctions in hundreds of millions of years, and many powerful ancient creatures have been extinct. In fact, the reason why Limulus can survive for hundreds of millions of years without extinction is closely related to its living habits.

Horseshoe crab (tachypleus amebocyte) is a warm water benthic arthropod, which inhabits in sandy bottom shallow water with a depth of 20 to 60 meters. And like to drill into the mud, and Limulus has a thick layer of “armor”, defense ability is relatively strong. More importantly, tachypleus amebocyte is not only bad in taste, but also prone to toxic shock after eating. Therefore, in the ocean, its natural enemies are very few, and few marine organisms will prey on tachypleus amebocyte because it is easy to kill.

For people who like marine life very much, eating horseshoe crab is also a scary thing. If it is not handled properly, it is easy to be poisoned, so fishermen from ancient times to the present rarely go to catch horseshoe crab. Under the protection of various reasons, tachypleus amebocyte lysate, an ancient creature, has been able to survive for a long time. It can be seen that if the natural creatures want to continue and not be extinct, it is better not to be too strong and popular, otherwise there are too many natural enemies and they will easily die halfway.

As the saying goes, the biggest natural enemy of nature’s biological world is actually human beings. Human beings are intelligent life and advanced life at the top of the food chain. In nature, unless there is no existence, as long as there is a living creature, human beings dare to try to eat. Marine life, in particular, has always been famous for its high nutrition and delicious taste in the human world. Therefore, as long as marine life can be caught, it can hardly escape the fate of being on the table.

Although the meat quality of tachypleus amebocyte lysate is poor, it is also easy to be poisoned, but some businesses make false propaganda for the benefit, and blow the value of tachypleus amebocyte lysate to the sky, so that many people who do not know the truth pay high prices to eat tachypleus amebocyte lysate, hoping to get higher nutrition. Why can businesses blow up the value of tachypleus amebocyte lysate? A very important reason is the particularity of Limulus blood.

As we all know, except for insects, the color of blood of most creatures is red. I believe many people have seen a movie “Wesley blue blood man”, in which the blood of extraterrestrial life is special blue, and these extraterrestrial human beings have special blue blood, so they have superhuman strength.

Maybe people used to think that blue blood was only something that science fiction movies had, but in the biological world of the earth, horseshoe crab has a special blue blood. This is the only creature with blue blood on earth except insects. It is because of the blue blood of tachypleus amebocyte lysate that some businesses advocate the particularity of tachypleus amebocyte lysate, and its meat is endowed with high nutritional value.

Why does horseshoe crab have special blue blood? This is related to its three “hearts”. When the gill like heart receives venous blood from around and transports venous blood to the gill, the carbon dioxide in the Limulus blood will be replaced by oxygen, and the blue seen by people is the color of vanadium in the Limulus blood.

The blood of tachypleus amebocyte lysate is so unique. Does it have any special use? The answer is yes. Originally, tachypleus amebocyte, because of its poor meat quality, is also prone to poisoning, which has faded out of people’s sight. But in 1860s, scientists found that the blood of the crab has a coagulant, which can react with bacteria and endotoxins quickly and produce a thick gel.

So the blue blood of tachypleus amebocyte lysate has become one of the most effective and rapid reagents for testing drug toxicity. Since then, the forgotten tachypleus amebocyte has become a precious synonym. A large number of tachypleus amebocyte has been caught by human beings, and then sent to the laboratory to extract blue blood with a needle.

Limulus amebocyte lysate can be widely used in endotoxin detection and quantification of injection, radioactive drugs, vaccines and other biological products, various liquids, food and dairy products. Scientists also use the blood of tachypleus amebocyte lysate to study cancer. The tail spines of tachypleus amebocyte lysate and the beads, shells, tails, eggs, meat and blood of tachypleus amebocyte lysate in its abdomen can be used as drugs.

Therefore, tachypleus amebocyte lysate, an ancient creature that has lasted for more than 400 million years, has once again been targeted by human beings. It has now become a valuable medicinal creature. People also like to go out and catch this creature and sell it to researchers at a high price. At this time, the merchants once again boast about this, which will increase the value of horseshoe crab infinitely and attract people to eat it.

It is because of the intervention of human beings that the number of tachypleus amebocyte is sharply reduced. If there is no control, it may eventually be destroyed in the hands of human beings in the near future, leading to the extinction of another ancient species.

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