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Hello kids! What animals do you know? Could you name more than 50? I'm sure you can, but

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would you be able to classify all of them? Let me help you and show me how much do you know

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about animals. Animal kingdom is divided into two big groups, vertebrates and invertebrates.

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Today we are going to learn about vertebrates. They are animals with an inner skeleton,

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which means that they have bones and a backbone. Their body is divided into head, trunk,

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limbs, and tail. Vertebrates are split into small groups, amphibians, reptiles, fish, birds,

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and mammals. Can you see this frog? It's an example of amphibians. They can live on land

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and in water, but how can they do that? They use lungs and bare skin to breathe on earth

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and gills to breathe in water. Amphibians are oviparous, they lay eggs in water and the babies

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are called tadpoles. They move using their four legs and they are called blooded animals.

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Now let's move to reptiles. One of their main characteristics is that their skin is covered

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with scales. They breathe through their lungs and, as the amphibians, they are oviparous

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and cold-blooded animals. However, some of them slither and some others are aquatic.

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The third group are fish. They can only live in water. They are aquatic animals, so they

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breathe through their gills. Their body is covered with scales and they move using fins.

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How do they reproduce? Through eggs. They are oviparous.

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Birds make up another new group. Their bodies are covered with feathers.

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They have a beak and wings, although not all of them can fly.

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They are oviparous and warm-blooded animals.

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And what about mammals? It's the group in which humans are included.

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Most of them are covered with hair or fur to keep them warm.

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Mammals use lungs to breathe.

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They are born from their mums and drink their mother's milk.

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Now, do you feel able to classify the vertebrates?