The animals

Animals Are those living beings that have movement, fulfill the life cycle of being born, grow, reproduce and die, feel, and feed on organic substances, present in the outside world, that provide them with energy, being called heterotrophs, since they do not produce their own food like plants (autotrophic nutrition).

Main characteristics of the animals.

Their cellular organization can be eukaryotic or multicellular.

In the nutritional aspect, they are heterotrophic beings by ingestion, which is done in one way or another depending on the animal.

All animals have an anaerobic metabolism, that is, they breathe oxygen and cannot live without it.

Another common characteristic of all animals is that they reproduce sexually, usually finding a male and a female animal in the process.

They are also symmetrical beings, with the exception of, for example, sponges. By having symmetry, they present a regular arrangement of the different parts or structures of their body along one or more body axes. Symmetry is either radial or bilateral.

vital functions of animals

Animals carry out a number of functions that they carry out in their daily lives and that allow them both their development as well as that of the species.

These vital functions can be carried out in different ways depending on the breed or type of animal, although they are carried out by all, including humans, and they are basic to life.

Specifically, these functions are: respiration, feeding, circulation, reproduction, excretion, response and movement.

How are animals classified?

Animals can be classified into different groups, depending on their most common characteristics, whether they are cold or warm blooded, whether they are terrestrial or aquatic, whether they lay eggs, or by their skin type, whether they have scales, gills, fins, wings, etc. shells, external or internal skeletons. These posters show the main classes of animals and list some of their most distinctive features.

¿Are animals divided into vertebrates and invertebrates?

Although the types of animals can be classified into two large groups (vertebrates and invertebrates), other forms of classification are currently used to account for certain characteristics; for example, if they have an endoskeleton or an exoskeleton, by their blood or hemolymph type, and by the way they gestate.

¿What are the main groups of animals?

The main types of animals are mammals, amphibians, reptiles, fish, birds, insects, arthropods, crustaceans, molluscs, arachnids, annelids, and gastropods. Its classification depends on several characteristics.

That was it