Vertebrates and Invertebrates

There are two basic types of animals, such as vertebrates which have backbones and invertebrates which don’t.
There are many kinds of vertebrates which are: FISH, REPTILES, AMPHIBIANS, BIRDS and MAMMALS.
FISH are cold-blooded animals and use their gills to breathe. Their skin is scaly and they lay eggs except for sharks, dolphins, whales which give birth and live young. Salmon, tuna, goldfish and clownfish are the examples of fish.
REPTILES are cold-blooded and have scaly skin, like fish, but they breathe through their lungs. Most of them lay eggs. Reptiles include snakes, tortoises, alligators, turtles and crocodiles.
AMPHIBIANS are cold-blooded animals which begin their life in the water, breathing through gills. When they have already grown up, they breathe through their lungs and finally, they can walk on the land. Some examples of amphibians are frogs and salamanders.
BIRDS are warm-blooded and have feathers and wings. All birds lay eggs. They can fly, not including penguins and ostriches. Eagles, parakeets and turkeys are all birds.
MAMMALS and birds are alike. They are warm-blooded. The differences are: mammals don’t lay eggs, but they give birth to live young. Most mammals live on the land and have fur on their body (except for whales, dolphins and sharks which live in the water). Wolf, chimpanzees and humans are all mammals.
There are also some kinds of invertebrates, such as SPONGES, COELENTERATES, ECHINODERMS, WORMS, MOLLUSKS and ARTHROPODS.
SPONGES live in the water and get their foods by filtering tiny organisms that swim by.
COELENTERATES use their mouth not only for eating, but also for eliminate the waste. There are many stinging tentacles around their mouth like corals, jellyfish and sea anemones.
ECHINODERMS live in the sea and have exoskeletons which means there are skeletons outside of their body, and usually the skeletons are the multiply of five. Echinoderms include sea urchins, starfish and sea cucumbers.
WORMS can live in variety places, including underwater, in dirt, or maybe inside other living creatures, like human’s bodies. There are many kinds of worms, such as roundworms, flatworms, earthworms, etc.
MOLLUSKS have soft bodies. To protect themselves, some mollusks have hard shells. Snails, slugs and squids are all mollusks.
ARTHROPODS’ bodies are divided into different parts. They also have exoskeletons. Arthropods include crustaceans such as lobsters, crabs and shrimps; arachnids including members of the spiders family, scorpions and ticks; and all insect for example butterflies, ants and bees.