What are mammals? Detailed answer

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What are mammals? Detailed answer

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What are mammals?

Mammals are the most developed class of animals. These include well-known animals: dogs, cats, hares, horses, cows, pigs, elephants, bears, mice and humans. There are hundreds and hundreds of mammals. These animals have certain traits, some of these traits are shared by other organisms, some are not. Mammals are vertebrates like fish, reptiles, birds.

All mammals have lungs and breathe air, as do birds, reptiles, and many amphibians. All mammals are warm-blooded. In this they are similar to birds. Animals of this class, with the exception of the two most primitive ones, which lay eggs, are viviparous, as are some fish, reptiles, insects, and other animals. But there are two properties that distinguish mammals from other animals. Only they have real hair, which is called fur or wool. And only they produce milk. Mammalian females feed their young with milk produced by glands, commonly called mammary glands, located on the body.

Mammals have other distinctive features as well. The lungs and heart of these animals are separated from the stomach and digestive tract by a muscle barrier called the diaphragm. The lower jaw of mammals consists of a single bone for both sides. But more importantly, the mammalian brain is more highly developed than the brains of any other animals.

Author: Likum A.

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