Done by: Omaima Al-abriID: 93594

VERTEBRATE &

INVERTEBRATE ANIMALS

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InvertebratesVertebrates

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INVERTEBRATES

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Protozoa are simple, single-celled animals. They are the smallest of all animals. Most protozoa are microscopic in size, and can only be seen under a microscope. However, they do breathe, move and reproduce like multicelled animals.

PROTOZOA

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Echinoderms are marine animals that live in the ocean. Common echinoderms include the sea star, sea urchin, sand dollar and sea cucumber. Most echinoderms have arms or spines that radiate from the center of their body. The central body contains their organs, and their mouth for feeding.

ECHINODERMS

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There are about 9,000 species of Annelids known today, including worms and leeches. They can be found almost anywhere in the world. Annelids have existed on Earth for over 120 million years.

ANNELIDS

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VERTEBRATES

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Almost three-forths of the world's surface is covered in water. This water is home to over 20,000 diff erent species of fish. The earliest fossils of fish date back over 400 million years.

FISH

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Reptiles have been around for 300 million years, even during the dinosaur age. The most common reptiles include alligators, crocodiles, lizards, snakes, tortoises and turtles. Reptiles are air-breathing animals, although many live not only on land but in water.

REPTILES

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There are over 8,000 species of birds. Birds have 3 major diff erentiating characteristics: wings for fl ight, feathers, and a beak rather than teeth.

BIRDS

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