What is a mammal, and what is a mammal

Mammals are a homeothermic, vertebrate with hair on their bodies, most of which are viviparous and feed their offspring through mammary glands.

Mammals are the highest group of vertebrates, evolved from reptiles, and the main characteristics are: hair on the surface of the body, generally divided into five parts: head, neck, trunk, limbs and tail; breathe with your lungs; has a constant body temperature and is a homeothermic animal; The brain is large and well developed; Suckle; Viviparous. Mammalism and viviparity are the most distinctive features of mammals.

The embryo develops in the mother's body, and the mother animal directly produces the fetus. Females have mammary glands and can secrete milk to feed their young. There are more than 3,500 species of mammals in the world, and about 450 species in China.

Mammals are the most closely related to humans and have significant economic value.

Mammals refer to a group of warm-blooded vertebrates that breathe air with their lungs in the subphylum Mammal, and are named because they can lactate their larvae by secreting milk through their mammary glands.

Mammals actually refer to viviparous mammals, and then the body surface is hairy, the teeth have canines, incisors and molars, which is the most typical characteristic of mammals, that is, viviparous mammals.

MammalsGenerally refers to the class Mammals, which is a class of the subphylum of vertebrates, collectively referred to as mammals. Mammals can be divided into protozoan subclasses, euzozon subclasses, and posterior zonal subclasses. Because it can be passedMammary glandsIt is named after the production of milk to nurse the larvae.

Common ones are humans, tigers, wolves, rats, deer, elephants, whales, etcDolphins, ferrets, etc.

Most mammals are vertebrates with a full body coat, rapid movement, constant temperature viviparity, and diaphragm in the body, and the vast majority are viviparous with placenta. It has a highly developed nervous system and senses, and can coordinate complex functional activities and adapt to changing environmental conditions.

Mammals have a variety of lifestyles such as land, underground, water, and air. Found all over the world, from antelopes in the savannahs to polar bears in the polar regions.

They can be found everywhere in the mountains and in the mountains and camels in the desert.

Difference Between Mammals and Oviparous Animals:

1. The difference between the two is mainly in reproduction, mammals are viviparous, and oviparous animals lay eggs.

2. The process of independent development of the animal's fertilized egg outside the mother's body is called oviparity. The egg develops into a new individual in vitro, and most of the nutrients required for embryonic development are ** in the yolk, and the egg is much larger than that of viviparous animals.

Oviparity is characterized by the fact that in embryonic development, it relies entirely on the yolk contained in the egg itself as nutrition. Oviparity is common in animals such as birds, reptiles.

Fish, mammals.

in the single-hole class.

Common animals are:1. Mammals.

Tigers, wolves, rats, deer, martens, monkeys, tapirs, sloths, zebras, dogs, foxes, bears, elephants, leopards, musk oxen, lions, red pandas, warthogs, antelopes, reindeer, koalas, rhinoceros, lynx, pangolins, giraffes, pandas, anteaters, orangutans, manatees, otters, civets, dolphins, walruses, platypus, hedgehogs, arctic foxes, koalas, polar bears, kangaroos, armadillos, hippos, seals, whales, ferrets.

2. Amphibians and reptiles.

Turtle, python, alligator lizard, monitor lizard, Chinese alligator, four-clawed tortoise, ground tortoise, hawksbill turtle, giant salamander green sea turtle, mountain turtle, giant gecko, tiger striped frog, leatherback turtle, concave tortoise, fine mole wart newt, Zhenhai wart newt, Guizhou warty newt, big cool wart newt, fine scroous wart newt, three-line closed-shell turtle, Yunnan closed-shell turtle, Pacific ridley turtle ruined Suichun.

3. Birds. Eagles, herons, geese, penguins, hornbills, relict gulls, falcons, storks, grouse, boobies, parrots, mandarin ducks, woodpeckers, owls, ibises, ostriches, kingfishers, swans, hummingbirds, albatrosses, cranes, pheasants, nightjars, seagulls, emus.

Mammals are a zoological classification. Mammals are the animals with the highest morphological structure and the most complete physiology in the animal world.

Compared to other animals, the most prominent feature of mammals is that they are viviparous and that their young are fed with milk secreted by their mothers. The mode of reproduction of mammals is generally viviparous, which adopts the method of fertilization in the body, allowing the fertilized egg to grow in the body, and finally growing into a young and expelling the fetus from the body.

Common mammals:

1. Monkeys. It is the closest mammal to humans, with a very flexible body, often jumping around trees, a penchant for bananas, and a long tail.

2. Cats. It is divided into many different breeds, and its body is covered with hair, which is very soft to the touch, and is often kept as a pet at home, and has a relatively docile temperament.

3. Pigs. When giving birth, a litter can give birth to many small piglets, with a cute short curly tail, which is very small when born, but when it grows up, it will become larger.

4. Hamsters. It looks like a mouse but is not a mouse, a small one, which looks like a small ball, but its life is very fragile, and it is easy to die if it is not raised properly.

5. Cattle. It is an animal that can often be seen in the grasslands, produces delicious milk, and has two horns on its head that is very aggressive.