What animal has the largest heart, and what animal does not have a heart

The largest animal in the world: the blue whale (the blue whale is not only the largest cetacean, but also larger than the largest dinosaur ever living on Earth, and is the largest of all animals known since ancient times, generally 2400-3400 cm in length and 150,000-200,000 kg, that is, its weight is equivalent to the weight of more than 25 African elephants, or the weight of 2000-3000 people combined. The largest animal in the world is the blue whale, which is the largest of the more than 90 species of whales in the world.

It has a slender fish-like body and a grayish-blue body. Blue whales feed on krill and are distributed in the world's oceans, especially in the Southern Ocean. Blue whales inhabit the North Pacific Ocean, and some can come to the coast of China.

The blue whale has a high oil production and is the most economically valuable whale species in the world whaling industry. In 1904, one of the largest blue whales was caught near the Falkland Islands in the Atlantic Ocean, which was 33 5 meters long and weighed 195 tons, equivalent to the weight of 35 elephants. One tongue weighs 3 tons, a heart weighs 700 kilograms, a lung weighs 1,500 kilograms, the total amount of blood is 8,9 tons, and the intestines are 250 meters long.

Such a huge body is actually the highest among the world's animals.

The world's largest animal, with a heart weighing 500 kilograms, is comparable to a car.

The animal with eight hearts is the balorosaurusBalorosaurus, also known as heavy dragon, is not only huge, but also has a neck of more than 9 meters, almost the tallest dinosaur in North America, but the long neck of the balorosaurus adds a burden to it.

Scientists have calculated that a six-ton heart is needed to get blood to the head at the top of the neck, but if the heart is really that big, the heart will beat very slowly, so that the blood sent to the neck is likely to flow back down before the next heartbeat, so some people speculate that this dragon has 8 hearts.

Baroron Introduction:

Balorosaurus is a member of the sauropod family of dinosaurs, mainly living from the late Jurassic to the Cretaceous period, and its fossils are mainly distributed in the United States and Tanzania in Africa.

The length of the body of the adult Balorosaurus is about 25 meters, the estimated weight is about 20 tons, and the neck of the Balorosaurus is more than ten meters long, although this is not uncommon in the long neck sauropod dinosaur family, but the proportion of the neck to the body is very large, there are a total of 16 neck bones on the neck of the Balorosaurus, and the middle of the cervical vertebrae is empty, which can reduce the weight of the long neck.

Animals that do not have hearts have:Roundworm.

Hookworm, abalone, jade snail, fragrant snail, red snail, Dongfeng snail, mud snail.

Cockles, mussels. Scallops, clams, oysters, clams, clams, squid, squid, octopus, snails, snails, mussels, clams.

Primitive heart formation:Although the human heart is very complex, it is speculated that the earliest form of the heart may be a distended cavity of the sac that can beat. The first animals to have such a heart-like organoid in animals were annelids.

For example, earthworms. That's why half of it can still be alive after cutting, but the other half can't).

Later, these chambers became larger and larger, and the cyst membrane formed the rudiments of blood vessels, which later evolved into the cardiovascular system. In fact, the heart is the circulatory system after the formation of blood vessels.

Specialized muscle areas in the middle stage evolve with stronger, more specialized cardiomyocytes.

Some of the lower animals, such as:AnnelidsEarthworms, for example, can have multiple hearts.

Take the more common ringed earthworm as an example, this earthworm has a thick blood vessel on the back and abdomen of the body, and four pairs of enlarged ring blood vessels are connected in the middle, and these ring blood vessels can beat rhythmically.

By beating, blood can flow throughout the body. People call these four pairs of ring blood vessels "four pairs of hearts".

The heart of an earthworm is not the same as the heart of a higher animal, it is actually a bulged annular blood vessel.

Habits of earthworms:

Generally speaking, the activity temperature of earthworms is 5-30, 0-5 enters a dormant state, dies below 0, the optimal temperature is about 20-27, and it is also the most suitable temperature for cocoon eggs, and when it is above 32, it stops growing and dies above 40.

Therefore, earthworm breeding: in summer and autumn, it is necessary to build a shade shed to cool down (the mulberry garden has natural shade conditions, but the mulberry tree still needs to be temporarily covered with shade after summer felling to germination and growth before it is closed), and in winter, the shed should be heated by fire (the silkworm room's own equipment can be used) or the mulberry garden should be covered with wheat grass to heat the temperature, so as to facilitate the normal growth and reproduction of earthworms.

The animal that has two hearts alive in the world is the earthworm. Earthworms are rich in nutrition, rapid reproduction, miscellaneous food, high yield of artificial breeding, and good economic benefits.

Earthworms can be used as a valuable medicine** for many diseases, and can also be used as high-protein food and feed.

Earthworms:

The body is segmented but not divided, the verrucous feet are vestigial, and the body surface is bristled. Hermaphroditic, 1-2 pairs of gonads, reproductive ducts of body luminal duct origin, rings appear on the body surface when sexually mature, mutual insemination can occur during mating, eggs are laid in the rings, and egg cocoons are formed after falling off, and develop directly.

The bristles are simple, 8, sometimes many, arranged in a ring, 1-2 pairs of sperm nests, usually at 10-11 nodes, male reproductive pores one pair, located on 2 or more somites after the posterior sperm nest, i.e. after 14 nodes. A pair of ovaries, located in the 13th segment, with a thicker annular band and less yolk.

Earthworms dig burrows to loosen the soil, decompose organic matter, and create good conditions for the growth and reproduction of soil microorganisms.

In terms of soil improvement, elimination of pollution, protection of the ecological environment, it plays a special role in material cycle, biodiversity, etc., and many countries use earthworms to treat domestic waste, organic waste and purify sewage.

1. Jellyfish animals do not have a heart: Jellyfish are animals that float in the water, belong to cell animals, and basically have nothing in their bodies, no brains, no hearts, no blood, no muscles and bones, and 98% of the body is water.

2. Scallop animals do not have hearts: Scallops are in the phylum Chordates.

None of them had a heart before because protozoa are single-celled organisms.

There are no hearts, and only after cephalic chordates do animals develop hearts such as fish, amphibians, etc.

Animals without hearts: squid, octopus, snails, etc.

1. What kind of earthworm is the animal with the most hearts in the world? Network data shows that earthworms are invertebrates are more common bait, with 5 to 10 hearts in the body, which is why earthworms can still live after being cut into several sections, but if they are cut into too many segments, earthworms will also die, now there are more than 200 kinds of earthworms in China, there are more than 3,000 kinds of earthworms in the world, and now there are many artificially bred earthworms, earthworms contain a lot of protein, and many amino acids in protein are necessary for the growth and development of livestock and fish. It is said that in some areas, if you want to change the soil, you will also use earthworms to improve it.

2. An octopus of several hearted animals. Octopus mollusks with 3 hearts. One of them is the body heart, which functions similarly to the heart of other animals, providing blood supply to the body.

The other two hearts are called gill hearts, the function of these two hearts is similar to that of human liver, playing the function of metabolism and excretion, the octopus has 3 hearts and can change color anywhere **", it is a stealth on the bottom of the sea, the octopus has 500 million more neurons than humans, and the IQ is very high, but the octopus has a very short lifespan, and sometimes it is eaten by other creatures before it has evolved;

3. The squid of several heart-like animals. Squid is a mollusk, unlike other fish, squid is an animal with 3 hearts, and the blood of squid is blue, using the pigment cells on the surface to change the color, squid is mainly distributed in tropical and temperate shallow seas, generally speaking of squid Many people think that squid is a fish rather than an animal, it has a slender body with a sucker at the front end, it is a mollusk that does live in the ocean, squid is a precious seafood with very high nutritional value, some people eat squid raw, The squid in the mouth feels like it's still bouncing;

Roundworm. Hookworm abalone, jade snail, fragrant snail, red snail, east snail, mud snail, cockle,Mussels, scallops, clams, oysters, clams, clams, clams, clamsSquidand other animals do not have hearts。Protozoa are single-celled organisms and do not have hearts. Before the phylum Chordates, there were no hearts, and only after cephalochordates did animals develop hearts such as fish, amphibians, etc.

There are no heart animals

Animals are the general term for all living things in the animal kingdom. The animal kingdom is divided into 35 phyla, more than 70 classes, and more than 350 orders, totaling more than 1.5 million different species.

From the classification of the animal kingdom, only the animals under the total of 5 phyla included after the phylum Annelida have hearts, and the animals are more advanced, and its heart is closer to the heart of humans, so it can be seen that the animals without hearts account for the vast majority.

Amoebae, radiolaria, flagellates, sarpods, trumpets, rhomboids, composed of about 20 to 30 cells, have no heart. Spongienic enterozoa.

Although the cells have begun to differentiate, they have not formed tissues and organs, and have a primitive nervous system.

Hydra. Jellyfish flat animal phylum, the most primitive three-germ animal without body cavity, has a primitive excretory system and a ladder-like nervous system. Planarians, flukes, tapeworms.

Phylum Nematode animals. Wheat nematode rotifers.