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Vertebrate animals, belonging to the animal kingdom, phylum chordata and which have vertebrae, that is, the bones that make up the spine.

It is important to highlight that not all vertebrate animals have a vertebral column, for example, agates or cyclostomados, which are primitive fish devoid of jaws and jaws (mixins, lampreys and ostracoderms).

In addition to Agates, the subphylum of vertebrates includes: fish, reptiles, amphibians, birds and mammals.

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Vertebrate animals are characterized by the presence of a spinal cord and a spine.

In addition, the central nervous system (brain and spinal cord), the muscular system (skeletal, cardiac and smooth muscle) and internal skeleton also form their structures.

Regarding the formation of organs, they have the tissues: connective, epithelial, vascular, muscular and nervous.

Their respiratory system, depending on the animal, occurs through gills (gill respiration) or lungs (pulmonary respiration).

The vertebrate body consists of two layers of skin, which are: the dermis (internal) and the epidermis (external).

It is worth remembering that birds and mammals also have an inner layer, before the dermis, known as the hypodermis (fat layer) and is related to the maintenance of body temperature.

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Fish are aquatic vertebrates, their skin is covered with scales and gill breath, that is, they have the ability to breathe in water.

There are about 28 thousand species of fish cataloged, their size can vary from 5 centimeters to 20 meters, as is the case of some sharks.

Fish can be found in rivers, lakes, weirs, swamps and in seas and oceans. Their diet is based on algae, but some species also feed on other animals, especially mollusks and small crustaceans.

Examples of fish include: stingray, barracuda, seahorse, shark, witch-fish, lamprey, clownfish, goldfish, among others.

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Reptiles are vertebrate animals whose skin is covered with scales or carapace and their breathing is carried out through the lungs.

These animals have a sensory system differentiated from other animals, because as they do not see well, their olfactory organ allows taste and smell to be felt, in addition some species are still able to hear.

Reptiles have a complete digestive system and, because of this, most of them are carnivores. The alligator is a predatory reptile and occupies the top of the food chain.

Most reptiles are terrestrial animals, but they live near water and, in addition, many of them are oviparous, that is, they hatch from eggs. Some examples are: snake, turtle, alligator, lizard, two-headed snake, etc.

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Amphibians have smooth, moist skin, have no hair, no feathers or scales. Eggs develop in the water and after being adults, live on the land.

They are animals that always live close to water, especially to keep their skin moist and for reproduction, as their bodies change.

When they are born they are called tadpoles and have gill breath. When they grow up, they transform and breathe through the lungs.

The main representatives of the amphibians are: frog, frog, tree frog, salamander and blind snake.

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Birds are vertebrate oviparous animals that can be found in different environments, currently there are more than 9 thousand species.


They have a body covered with feathers, have legs, beaks and wings. Not all species have the ability to fly, which is justified by the formation of the body.

One of its main characteristics is in the feathers and in the song, which some species use as a way to attract the female.

Some bird species suffer the most from animal trafficking, contributing to many being considered at risk of extinction.

Some examples of birds are: rhea, chicken, hummingbird, penguin, john of clay, etc.

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Mammals are animals in which the female feeds her young with milk from her breasts. It is estimated that there are more than 5,000 species worldwide, and can be found in terrestrial and aquatic environments.

The feeding of these animals varies according to the species, being able to be carnivores, herbivores or omnivores.

Mammals have pulmonary respiration, a complex nervous system and reproduction is sexual.

As aquatic mammals we can mention whales and dolphins. Among the terrestrials some examples are: cat, dog, monkey, horse, lion, jaguar, cow, etc

In addition, bats are examples of aerial mammals and the polar bear, which is a land animal with swimming ability.

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The term vertebrate comes from the Latin "vertebratus" and means "presence of vertebrae".
The number of vertebrate animals in existence is approximately 50 thousand species.
Vertebrate animals are living beings that have the most advanced organism on the planet.
Probably the origin of vertebrate animals was about 450 million years ago.