Sofia unit8
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Vertebrates have a spinal column and internal skeleton with a head, trunk, and extremities. They classify into five groups: fish, amphibians, birds, reptiles, and mammals. Fish have scales, gills, fins and lay eggs in water. Amphibians have gills as young and lungs as adults and absorb oxygen through their skin. They lay eggs and most eat insects. Reptiles have scales, breathe with lungs, lay eggs, and can be carnivores or herbivores such as lizards, snakes, turtles and crocodiles. Birds have feathers, lungs, lay eggs, and two legs and wings to fly and eat plants, grains, insects or meat. M
Sofia unit8
- 2. Vertebrates animals have got a spinal column or a internal skeleton.They have three main part: the head, trunk and extremities.Their nervous system and sense organs are very well- developed
- 3. Groups of vertebrates We can classify vertebrates into five groups: fish , amphibians , birds, mammals, reptiles
- 4. Fish Fish have got a long body that is covered with scales. They breathe with gills and they use their fins to swim. Almost all fish are oviparous. The females produce eggs and lay them in the water. Most fish are also some herbivorous and omnivorous. All fish have got a skeleton, but there are two difference types.Bony fish and cartilaginous fish.
- 5. Amphibians When they are young they have gills to breathe underwater. When they are adult they have got lungs to breathe air, but they can absorb oxygen through their skin. Cuatenous respiration. They are oviparous animals. Most of them are carnivores. They eat insects, crustaceans, sanils, worms and small fish.
- 6. The two main groups of amphibians Frogs and toads Salamanders and newts
- 7. Reptiles They have got hard scales on their bodies. They breathe by lungs. Reptiles are oviparous. Many are carnivores and others are herbivores. They main groups are: lizards, snakes, turtles and crocodliles.
- 8. Reptiles
- 9. Birds Birds have got feathers on their body, and also two legs and two wings. They breath by lungs, they are oviparous and they have got aerodynamic bodies. They can be herbivorous, granivorous, insectivorous, carnivorous or omnivorous.
- 10. Mammals They usually got some hair on their bodies. All of them have lungs to breathe air. Female have got mmary glands to produce milk to feed their young. They can be carnivores, herbivores, insectivorous or omnivorous.
- 11. Mammals