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- Vertebrates are animals that have a backbone in their body.

- They have five types...

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- They are vertebrates and include a great and long diversity of species

- They have different kinds of glands.

- Mammals are tetrapods.

- The body is covered by hair or fur.

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- Like birds, they are endothermic animals.

- They breathe by lungs.

- They are viviparous.

- They have already a very developed nervous system.

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MARSUPIALS: They are viviparous, but do not have a developed placenta. The young are tiny and at birth they complete their development in the mother's pouch.

MONOTREMES: They are the only mammals that are oviparous, thet, is, they lay eggs. They have fur and feed their young with milk.

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- Humans beigns are vertebrates and placental mammals.

- They born completely developed.

- Little hair in our bodies.

- Females develop mammary glands, which are located in the breast.

- Our skin has many sweat glands, that provides our temperature.

- The size of the human brains is very large, in comparison to the size of the human body.

- We can comunicate very well, with individuals of our own specie and we are able to learn.

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- They are vertebrates with wings

- They don't have teeth, they have a storng beak.

-They have feathers and scales on the legs.

- They are bipeds, their front limbs have become wings.

- Their bodies are fusiform and their necks are usually long.

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- They are endothermic. They are able to produce and maintain their own heat to keep a constant body temperature, regardless of the temperature of their enviroment.

- They breathe through lungs.

- Their eating habits are varied and related to the size and shape of their beaks.

- They lay amniotic eggs with hard shells, so they are oviparous.

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- Are mostly terrestrial vertebrates, although there are few species of marine reptiles, for example, turtles and cocodiles.

- Their scaly skin is tough and dry. They have scales made of keratin that protect them from dehydration.

- They are tetrapods, their legs are adapted for walking, climing or swimming.

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- They are ectothermic or cold-blooded animals.

- They breathe through lungs.

- Most reptiles are carnivores and hunt their prey.

- They are oviparous. Their eggs, which can be leather or hard-shelled, cotain a series of sacs that provide food and protection to the embyro.

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- They have strong muscles which propel their bodies as they swim.

- Their bodies are smooth, fusiform, and covered with scales.

Their limbs are fins that allow them to swim, change direction and maintain stability in the water.

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- Their body temperature changes according to the temperature of their environment, and they are ectothermic.

- Fish take the oxigen dissolve in the water into their bodies throw the gills.

- The majority of fish are carnivores, the rest are herbivores, omnivores or eat the remains of other organisms.

- They produce by laying eggs, so they are oviparous.

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- Some have a skeleton made of cartilage, they are called          (cartilaginous fish), Such as sharks. And others have a skeleton made of bone, they are called (bony fish).

- In cartilaginous fish, the gills open directly to the water. And in bony fish, the giils are protected by a cover (operculum).

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They are tetrapods. Their
limbs support them
on the ground and
allow them to move
around on land.

- They have thin, moist
skin. A sticky mucus
produced by glands
under their skin helps
them stay moist. Other
glands secrete poison.

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- They are cold-blooded. Their body temperature changes according to the temperature of their enviroment.

- They breathe mainly through their skin which must remain moist for the oxygen to be absorbed into their bodies. They can also breathe through their lungs.

- The majority of amphibians are carnovores; tadpoles, however, are hervibores.

- They are oviparous: they lay eggs in the water.

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Metamorphosis is the developmental process some animals go through from birth to adulthood as they grow.

- In the case of frogs, tadpoles are aquatic animals and herbivores. They undergo significant changes as they develop until they become adult amphibians. As terrestrial animals, they are carnivores.

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The Life Cycle of a Frog | Frog Life Cycle | Video for Kids