Are dinosaurs homeotherms and what kind of animals are dinosaurs?

There are many species of dinosaurs, and their biology can only be inferred from a limited number of fossils. Some scientists believe that at least some dinosaur species may have been homeothermics, and their reasoning is that some dinosaurs could move upright and move far from the ground, indicating that they no longer needed heat from the terrestrial environment; If they are ectotherms, then they should be able to regulate the metabolic level of the body and hibernate in areas with severe winter temperatures, but animals that are too large will encounter physiological insurmountable obstacles when hibernating; If dinosaurs and crocodiles were both ectotherms in terms of physiological mechanism, then there is no way to explain why the dinosaurs were all extinct while the crocodiles survived.

In any case, dinosaurs are by no means reptiles in the sense of a crocodile, and although the two are similar in appearance, this is not a reason to confuse them, just as dolphins are like fish, but by no means fish.

Dinosaurs were reptiles, and these animals were cold-blooded, and their body temperature was related to their environment, not homeotherms.

I think it's ectotherms, close relatives of dinosaurs, and reptiles whose body temperature changes with temperature.

Ah, according to paleontologists, dinosaurs were reptiles, and of course they were cold-blooded.

Dinosaurs seem to be cold-blooded animals as far as I know!

I haven't seen a dinosaur, I don't know, but I can know that dinosaurs are animals

Dinosaurs were chordates, a class of sauriformes that lived in the Mesozoic Era.

To facilitate research, dinosaurs can be divided into avian and non-avian dinosaurs. Among them, non-avian dinosaurs lived only in the Mesozoic era (Triassic, Jurassic and Cretaceous) and were all extinct 65 million years ago. This entry mainly introduces non-avian dinosaurs.

The muscular limbs, long tails, and massive bodies are some of the non-avian dinosaurs. They mainly inhabit woodlands or open areas on lakeshore plains (or coastal plains).

In 1841, when British scientist Richard Owen studied several fossilized lizard bones, he believed that they were left by some prehistoric animal and named them dinosaurs, which means "terrifying lizards".

Dinosaurs are still reptiles.

Reptile characteristics: body surface covered with scales or nails; Pulmonary respiration; The ventricles have an incomplete septum; in vivo fertilization; The eggs have a tough shell; The body temperature is not constant.

Characteristics of mammalia: whole body coat, viviparous, with placenta (except for monopore), lactation (with mammary glands).

Some animals have a vague taxonomic status, such as dinosaurs, which may be homeothermic or hairy (feathered), but this does not lead to the assumption that they are mammals.

If you have to draw a dividing line between reptiles and mammals, then.

It has 7 cervical vertebrae, and except for a few species, mammals have 7 cervical vertebrae (manatees, two-toed sloths have 6 cervical vertebrae).

It has a double occipital condyle. The lower jaw is made up of a single tooth bone and is directly connected to the skull.

The above three points are the distinguishing characteristics of mammalian bones.

Dinosaur (English name: dinosaur) is a group of reptiles that appeared during the Mesozoic era (Triassic, Jurassic and Cretaceous), with vigorous limbs, long shackled tails and huge bodies that portrayed most dinosaurs. They inhabit mainly woodlands or open areas on lakeshore plains (or coastal chain plains).

The dinosaurs suddenly disappeared at the end of the Cretaceous period 65 million years ago, becoming a mystery in the history of the evolution of life on Earth, which is still unsolved. All of the earth's past creatures are recorded in fossils.

In the strata of the Mesozoic era, many dinosaur fossils have been found. A large number of bones can be seen in a variety of shapes. However, in the Cenozoic strata that followed, there were no fossils of non-avian dinosaur tremors, which suggests that non-avian dinosaurs became extinct together during the Mesozoic Era, and now only birds remain, and most scientists agree that "birds belong to dinosaurs".

Chordates, phylum sauriformes.

Dinosaurs are sauriformes of the phylum Chordates. Dinosaurs are scaly descendants of reptiles, dinosaurs lay hard-shelled eggs, stand with legs sticking vertically from under their bodies, rather than from the sides like crocodiles, and, at least, some dinosaurs still have feathers.

Distribution of dinosaurs:

Dinosaurs have ruled the earth for hundreds of millions of years, and dinosaurs have existed on almost every continent.

The distribution of dinosaurs on 7 continents: 269 species in Asia, 169 species in North America, 126 species in Europe, 101 species in South America, 66 species in Africa, 19 species in Oceania, and 4 species in Antarctica.

Dinosaurs have been found in 52 countries or regions, including China, the United States, Argentina, Mongolia, the United Kingdom, Canada, France, Australia, Portugal, Brazil, Germany, South Africa, Niger, Spain, Morocco, Romania, India, Madagascar, Thailand, Tanzania, Egypt, Pakistan, Russia, Uzbekistan, Austria, Belgium, etc.

Dinosaurs appeared around the middle and late Triassic period, and the Jurassic and Cretaceous periods were very prosperous, and this period is called the Mesozoic Era. Dinosaurs were the "rulers" of the earth during this period, so the Mesozoic Era is often referred to as the "age of dinosaurs" or "reptiles".

It can be seen that dinosaurs are reptiles, and reptiles are members of the vertebrate family.

Dinosaurs are extremely widely distributed, and their tracks can be found all over the world, such as Africa and China, which were once the homeland of dinosaurs. The very famous dinosaurs in China include Mamenxi dragon, air dragon, giant Shandong dragon, spiny-nosed Qingdao dragon and so on.

There were many types of dinosaurs in the Mesozoic Era, including carnivorous dinosaurs, herbivorous dinosaurs, omnivorous dinosaurs, quadrupedal dinosaurs, and bipedal dinosaurs. Of course, they also have a lot in common, for example, they are all oviparous, ** covered with scale armor or bone plates.