They are the most regenerative known species of any living animal. Theoretically, the body of this species could be amputated multiple times, and even the whole body could regrow from a 200,000 part of the body.
Referring to the ability to reincarnate, many Marvel fans will immediately think of Deadpool, but the animal we are talking about is a worm. As previous studies have shown, earthworms can regenerate themselves when the body is broken down into 22 different parts.
However, the regeneration of the earthworm is still only limited, and its cut parts cannot regenerate completely.
Several experiments have found that when the earthworm’s body is divided into different parts, the body part containing the tail has the weakest ability to regenerate, followed by the body part without the head as well as the body part without the head. There is no tail and the most regenerative body part is the part containing the head of the worm. In fact, the longer an earthworm has lived, the stronger its body’s ability to regenerate will be. Moreover, when the length of the removed segment is more than 1/2 of the total length of the earthworm’s body, the earthworm will be damaged and can only regenerate partially and it is difficult to regenerate completely in length. original body.
In addition, when the body segments at the head are removed too many times, it will cause the phenomenon of not being able to regenerate, even direct death. As a result, the earthworm’s regenerative ability is limited, and it’s still far behind Deadpool’s ability.
Other animals such as geckos can only grow tails, spiders can only grow new legs, their regeneration ability is worse than earthworms. The sponge animal can regenerate from any part, but since it has no nervous system – and whether it is an animal or not, scientists are still debating about it. so sponge animals are not within the scope of today’s discussion.
And today we will talk about another miraculous animal, its extraordinary regenerative ability is comparable to Deadpool, many times stronger than earthworms, because no matter what part of it is lost. If you go, you can still grow a new one, even a head. And this animal belongs to the family of tapworms (Nemertina), and they are known as Lineus (shoeworms).
There are about 1,275 species of Lineus worms, of two classes and four orders, distributed geographically, from the Arctic to the Antarctic, and most of them live in seawater. The length of these species ranges from a few micrometers to several meters. For example, Lineus longissimus found in the English Channel can be up to 30m long.
They are carnivores. Although they are predators, they do not possess fast movement speed, instead they will wait for the moment when their prey is open and rush to attack with a bite.
Lineus worms found in Hiroshima Bay, Japan contain a large amount of tetrodotoxin, the total amount of toxins in the worm’s body can be up to 14,734 MU/g, distributed mainly in the epidermal cells of the body. worm bodies, the snout, the lumen, the intestinal wall near the blood vessels, and even the excretory organs. Their eggs also contain a certain amount of the toxin tetrodotoxin. Some other species of Lineus worms will not hunt, but will eat the eggs of certain fish or crustaceans.
Although Lineus worms are widely distributed, among many species, they are animals that lack a lot of in-depth research, possibly because they have little economic and application value.
Talking about the ability to regenerate, our main character, Lineus sanguineus worm is the most powerful regenerative species, they have a slender body and a body length of about 20cm, mainly living in the northeast Atlantic Ocean and the coasts of North America.
Lineus sanguineus is the most regenerative known species of any animal present on Earth. Theoretically, the body of this species could be amputated multiple times, and even the whole body could be regrowed from a 200,000 part of the body.
In fact, the ability to regenerate is present in all species of worms and they differ only in the ability and degree of regeneration of the body. As for why worms have such strong regenerative ability, recently, scientists have discovered a strange gene in worms called Hofstenia miamia, which also has the same ability to regenerate. Similar to an earthworm, when cut into two or three segments, it can still regenerate its body completely.
The scientists sequenced the genes of this species, then split them into two separate parts, observing the dynamic response of the DNA during regeneration showing EGR (Early Growth Response Protein, incl. EGR1, EGR2, EGR3 and EGR4) are the genes that are primarily activated during this process. When the scientists destroyed the gene function of EGRs, they ceased to grow and the ability to regenerate also disappeared. In other words, EGR is closely related to the self-healing ability, which helps to activate the regeneration process of the worms.
It must be said that these studies are only at the experimental stage and experimental results, and cannot be applied to any field. But maybe in the future, if scientists can apply this regeneration ability to humans, maybe everyone will be Deadpool.