What animal does not have a head, and what animal does the head represent?

A starfish-like animal swam with five long arms, it looks like it has no head or eyes, but in fact each arm is covered with "eyes", and its whole body is a huge compound eye. Scientists are studying this delicate structure, hoping to imitate it to make miniature lenses for use on future optical computers.

Scientists at Bell Labs in the United States reported in the latest issue of the British journal Nature that while studying the animal, known as the sea serpent's tail, they stumbled upon a bone plate made of calcium carbonate on its body surface made of a number of tiny convex lenses. The lens has a diameter of about 1 20 mm and focuses light 5 microns below the body surface.

Researchers say sea snake tails don't have brains, but they do have nervous systems. Tiny lenses may focus light onto nerve bundles, producing visual signals. In this way, tiny lenses spread throughout the body form a compound eye that can see in all directions, similar to the compound eye of an insect.

It is unclear what the quality of the image produced by this compound eye system of the sea serpent tail is, but it should be able to perceive the direction and intensity of the light, which is very useful when evading predators. Jiangnan Times (2001-08-29 4th edition).

Crab. Eight legs are horizontal, two chelae are stretched forward, and two eyes are long. Eight legs are horizontal, two chelae are stretched forward, and two eyes are long.

Wenchang fishIt is the general name of the Wenchang fish genus of the Wenchang fish family, also known as the slug, which belongsChordate.

The length of the Wenchang fish is about 50 mm。It resembles a small fish, headless, and has thin ends. The body is flattened laterally, semi-permeableMing, the notochord runs through the body.

There are eyespots on the front end. The mouth is hidden in the mouth hat, the mouthThere are 38 50 borderline tentacles on the edge of the Kasa. It has dorsal, anal and caudal fins.

There is 1 pair of abdominal folds on the abdomen. Dioecious, gonads arranged in pairs from left to right. It inhabits the loose sandy seabed, often burrowed in the sand, only the front end is exposed, and filters diatoms and small plankton.

Breeding in late spring and early summer, juveniles burrow into the sand after a short period of planktonism.

1. Wenchang fish** is thin and translucent, composed of two parts: the epidermis of a single layer of cylindrical cells and the dermis of jelly gelatinous connective tissue, and the epidermis is covered with a layer of corneal cortex.

The epidermis is ciliated in the outer larval stage, which disappear when it grows.

Wenchang fish has not yet formed a bony skeleton, and mainly uses the notochord that runs through the whole body as a central axis scaffold to support the animal body.

2. There is a notochord sheath on the periphery of the notochord, which is continuous with the adventitia of the dorsal neural tube, the muscle septum between sarcomeres, and the subcutaneous connective tissue.

3. The flesh of Wenchang fish is red, crystal clear, translucent, with two pointed ends, the body is spindle-shaped, slightly like a small fish, without obvious head, 40 57 mm.

4. The front end of Wenchang fish has an eyepoint, which is a visual device, and the lower part is the vestibule and the mouth is called "mouth hat". There are 40 tendrils around the vestibule, and there are vertical gill slits on both sides of the pharynx, and the gill cleft of Wenchang fish is only 8 pairs when it is embryonic, but it increases to 180 pairs when it reaches adulthood.

5. The gill slits of Wenchang fish do not directly lead to the opening of the body surface, but are wrapped by ** and muscles, forming a pair of special "perigill cavities".

6. The posterior end of Wenchang fish has a caudal fin and an anal anterior fin, and there is a dorsal fold on the back, which is a layer of epithelium, and there is no real bony fin at all; There is also a pair of skinfolds on the ventral surface, called "ventral folds". There is an abdominal foramen at the junction of the ventral fold and the anterior fin of the anus, which is the opening of the perigill cavity through the outside of the body.

7. There are 65 transparent and distinct V-shaped sarcometes staggered on both sides of the body, and the tip part of the V-shaped part is facing forward, which is beneficial for forward movement in water.

Hydra does not have a head, and the nervous tissue of the animal tends to be in the direction of movement, that is, the front end is concentrated. This phenomenon only began to appear in the phylum Platyzoa, in multicellular animals only coelenterate radiation symmetry, there is no distinction between front and back, reticular nervous system, naturally can not be called a head, such animals are common jellyfish, anemones, etc. Protochordates among chordates (including the subphylum Caudal Chordates and the Subphylum cephalic chordates) belong to the class headless, vertebrates.

The head represents the animal: largeMammals。Such as: pigs, cows, sheep,Elephants, whales, etc.

A head is a measure word that is usually used to denote a unit of quantity for a person, thing, object, or action.

of words. Such as: head, horse, strip, individual, etc.

Quantifiers are divided into two categories: object quantifiers and momentum quantifiers. Quantifiers denote the units of calculation of people and things. Such as the "strip" in "a fish".

Momentum words indicate the number of actions and the total amount of time they take place. For example, the "times" in "check three times". The quantifier "head" belongs to the quantifier of things.

Mandarin is pronounced tóu, which belongs to the Six BooksGlyphic charactersThe basic meaning of "head" is the uppermost part of the human body or the anterior part of the animal's body, such as the skull; By extension, it means a leader, such as a leader.

Animals

The first animals on Earth originated from the ocean. Early marine animals.

After a long geological period, various branches gradually evolved, enriching the early life forms of the earth.

Prehistoric animals appeared before the advent of humans and flourished during their respective periods of activity. Later, they became extinct one after another in a constantly changing environment. However, the animals on Earth continue to evolve and reproduce from the lower to the higher, from the simple to the complex, and have the diversity they have today.

Scientists have also discovered more than 1.3 million species of invertebrates. Most of these animals are insects, and most of the insects are beetles. Slugs, earthworms.

Squid, oysters, red starfish, jellyfish, spiders, polyps, radiolaria, roundworms, pork tapeworms, sand silkworms, snails, slugs.

and so on are invertebrates.

Hydras do not have heads.

The nerve tissue of the hydra tends to be in the direction of movement, that is, the anterior end. This phenomenon only began to appear in the phylum Platyzoa, and in multicellular animals, only coelenterates were radially symmetrical, and there was no distinction between front and back, and the reticular nervous system could not be called a head.

Hydra (scientific name: hydra), a coelenterate, has a cylindrical, brown body, tentacles around the mouth, is a tool for predation, and has a cavity in the body. Multicellular invertebrates, including buds and testes, are mostly found in the sea, and a few species are produced in freshwater, attached to aquatic weeds or dead leaves in ponds and marshes, ditches.

The most common are brown hydra (, green hydra (. Hydras are generally small, only a few millimeters, and need to be studied under a microscope. Many scientists are focusing on why they age so slowly.

The "headless zodiac" riddle is the horse. The cow removes its head and is a "noon", which refers to the zodiac horse.

Zodiac Signs:

The 12 zodiac signs, also known as the 12 zodiac signs, are 12 animals in China that match the 12 earthly branches with the year of birth of the person, including the rat, the ox, the tiger, the rabbit, the dragon, the snake, the horse, the sheep, the monkey, the rooster, the dog, and the pig.

The earliest hand-me-down document that records the same zodiac as today is the Eastern Han Dynasty Wang Kuan's envy of the "Treatise on Heng", the twelve zodiac signs are the figurative representatives of the twelve earthly branches, namely Zi (rat), Chou (ox), Yin (tiger), Mao (rabbit), Chen (dragon), Si (snake), Wu (horse), Wei (sheep), Shen (monkey), You (chicken), 戌 (dog), Hai (pig).

With the development of history, it has gradually integrated into the folk belief concept of mutual reciprocity, which is manifested in marriage, life, New Year's fortune, etc., each zodiac has a rich legend, and thus forms a concept interpretation system, which has become an image philosophy in folk culture, such as the zodiac on the marriage, temple prayer, natal year, etc. <>

Many strange animals exist in our world, many of which we have never heard of. However, among these animals, there is one animal that is very mysterious, and that is the animal that has no head or tail. We all know that animals have heads and tails, so what is this animal?

There is no legend with a head or tail.

Although we never seem to have seen an animal without a head and tail, you may have heard of this strange creature. In ancient Persian mythology, there was an animal called "Iranian kava" that had no head or tail. Legend has it that this animal resembles a giant ring, with an eye and a huge mouth that can swallow a whole person.

A real animal without a head or tail.

However, the real animals that exist without heads and tails are not what they are in mythology. In the animal kingdom, there is a creature called the sea squirt, which has no head or tail. Sea squirts are a sea dan that looks like a bag and resembles a sea cucumber.

They don't have eyes, brains, intestines, or locomotor organs, but they have a very effective filtration system that filters nutrients from seawater.

Characteristics of sea squirts.

Sea squirts are very effective at filtering nutrients from seawater. Tiny organisms in seawater, such as bacteria, small zooplankton, crustaceans, etc., are the favorite food of sea squirts. At the same time, sea squirts are also very well adapted to the marine living environment.

They can attach to rocks or other solid materials, live in the sea, and cooperate with each other to form a large group of sea squirts.

The value of sea squirts.

Although sea squirts may seem simple, they have a huge impact on marine ecology. They can act as a link in the marine ecosystem to maintain the balance of marine life. At the same time, sea squirts can also be used to produce products such as pharmaceuticals and cosmetics.

On the southern coast of China, many people also use sea squirts to cook delicacies and make traditional delicacies such as sea squirt rice.

Conclusion. Although animals without heads and tails do not exist in the real animal kingdom, sea squirts are very special creatures that have appeared in our reality. The simple but important life characteristics of sea squirts allow us to better understand the mysteries of nature, better protect the natural environment, and maintain ecological balance.

Hairless animals include fish, amphibians, reptiles, birds, and mammals. Among them, the Heyu mammal is the only animal that has hair. However, there are also some species in mammals that are hairless, such as naked mole rats, naked dogs, and naked ferrets, among others.

Animals with brains, on the other hand, are those that have a certain level of intelligence and cognitive abilities. These animals can solve problems and survive through their ability to learn and adapt to their environment. Of all these animals, primates (such as monkeys, gorillas, and humans) are the most intelligent.

They have complex social behaviors and a high degree of cognitive ability, using tools, problem-solving, and learning languages, among other things.

In addition, some birds (such as crows, parrots, and pigeons) are also considered to be animals with brains, which can use tools, have long-term memory, and solve complex problems, among other things. Other animals with brains include some mammals (such as dolphins, elephants, and rhinos) and reptiles (such as crocodiles and lizards).

In short, hairless animals and brained animals are two different concepts, and there is no necessary connection between them. In nature, there are many hairless animals that also have a certain amount of intelligence and cognitive ability.

A hairless animal is a hairless animal, and an animal with a brain is a mammal. Animals that feed schizous have a complex nervous system, have a high level of intelligence, and are capable of complex thinking and behavior. Their fluid brains control body movements and are able to learn and remember, allowing for self-protection and self-regulation.

Workaround:1Learn about mammalian characteristics: Mammals are characterized by having a complex nervous system, having a high level of intelligence, and being able to think and act in a complex way.

2.Learn mammalian behaviors: Mammalian behaviors include self-protection, self-regulation, learning, and memory.

3.Understand the habits of mammals: The habits of mammals include reproduction, social behavior, spatial behavior, etc.

4.Learn about mammalian ecology: The study of mammalian ecology includes population structure, population dynamics, and spatial distribution of populations.

5.Learn about the reproduction of mammalian animal destruction: Mammalian reproduction includes mating, gestation, littering, etc.

Through these steps, we can better understand mammals and thus better protect and manage them.

How to set hair, what is an animal, what is a brain animal? This is an interesting question, and we can approach it from the following perspectives.

First of all, from a biological point of view, hair is an important characteristic of mammals, and their hair can provide functions such as heat preservation, protection, camouflage, etc. Therefore, if we imagine an animal with a mind, considering the function of hair, we can think of many mammals, such as orangutans, chimpanzees, giant pandas, etc.

Secondly, from the perspective of human culture, we often associate some animals with the mind, such as monkeys, foxes, dogs, etc. These animals have images such as intelligence, wit, and flexibility in human culture, so these animals are also some good choices if you envision animals with brains.

Third, from the perspective of science fiction literature and movies, we can see many fictional animals with brains, such as the noisy Vulcans in Star Trek, the seal people in The Hitchhiker's Guide to the Galaxy, etc. These fictional animals not only have intelligence and minds, but also have many abilities and characteristics that humans do not have.

Finally, from real-world examples, we can see that some animals do have amazing intelligence and brains, such as gorillas, birds, dolphins, etc. These animals exhibit many abilities and behaviors in nature that humans cannot imagine, such as using tools, cooperation, verbal communication, and so on.

To sum up, imagining what kind of animal with a mind is a hairy animal can be considered from biology, human culture, science fiction literature and movies, and examples from the real world. No matter which way we look at it, we can find that there are many animals with amazing intelligence and minds, and they play an important role in the natural world that is worth exploring and understanding.