Get Animal Life: Secrets of the Animal World Revealed PDF

By DK Publishing

ISBN-10: 0756688868

ISBN-13: 9780756688868

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Extra resources for Animal Life: Secrets of the Animal World Revealed

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Gaseous exchange is carried out by means of gills, leaflike book lungs, or a branching system of minute, air-filled tubes called tracheae. The central nervous system consists of a brain, situated in the head, connected to paired nerve cords running along the underside of the body. Exoskeleton The body is covered by the cuticle—a tough, lightweight exoskeleton made of protein and chitin—which is secreted by the epidermal cells. To permit movement, the exoskeleton has joints and hinges where the cuticle is soft and flexible.

Myriapoda Arthropods with a head and trunk. The head has one pair of antennae and simple eyes. Trunk segments have one pair of legs, but may be fused into double segments. SYMPHYLANS MUSSEL AND SEED SHRIMPS SPIDERS SCORPIONS Araneae Species 40,000 Scorpiones Species 1,400 PAUROPODS Pauropoda Species 500 Acariformes Species 32,000 BARNACLES, COPEPODS, AND RELATIVES Branchiopoda Species 1,000 ARACHNIDS MITES WATER FLEAS AND RELATIVES Maxillopoda Species 10,000 Arachnida Mainly terrestrial chelicerates with pairs of simple eyes.

8 m) Bibron’s burrowing asp Atractaspis bibroni 20–28 in (50–70 cm) Cuban woodsnake Tropidophis melanurus 31 in–39in (80–100 cm) Eastern coral snake Micrurus fulvius 28–39 in (70–100 cm) Crocodiles, alligators, and gharials Order Crocodilia Crocodilians are one of the two surviving groups from an evolutionary line that also contained the extinct dinosaurs, the other survivors being the birds. Crocodilians are covered with thick bony plates and are semiaquatic predators. Their social behavior, complex displays, and vocalizations set them apart from all other reptiles.

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Animal Life: Secrets of the Animal World Revealed by DK Publishing


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