ANIMALS - organisms that form part of the organic world. Animals are heterotrophs, since they do not have the ability to synthesize nutrients of inorganic compounds and organic compounds comprise food. Also among the distinctive features of animals is the ability to actively move.

Animals are represented by two main types of organisms - unicellular and multicellular. To date, there are approximately 1.5 to 2 million different species of animals, large and small, living in the water, on land, in the air. Among this diversity of species the greatest diversity of wildlife is represented by insects.

Classification of animals until recently gained a clear structure. For example, the simplest lately do not consider the type and referred to subkingdoms animal kingdom. Representatives of the animal world can be divided into cold-blooded (fish, amphibians, reptiles) and warm-blooded animals (mammals, birds). Under the influence of anthropogenic factors many species of animals inexorably declining, and some species have disappeared altogether.

In our catalog, in the "Animals" will be the most interesting specimens. Birds, insects and fish, for convenience we view as a separate category.

Pay attention to the fact that part of individuals placed in a folder in habitat, so in the "Fish" can be found some mammals, and in the "Animals" some species of birds .

Animals - Facts 1