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Reptiles PowerPoint Presentation

Reptiles

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Reptiles

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  1. Reptiles By: Chris Kan & Raymond Nguyen

  2. Introduction • Ectothermic vertebrates with lungs and scaly skin (waterproof). • Reptiles are divided into four orders: • Order Testudinata (Chelonia) - turtles and tortoisesOrder Crocodilia - crocodiles and allies Order Rhynchocephalia - tuataras Order Squamata - snakes and lizards • With over 8,163 different species, reptiles are found on every continent, except Antarctica. • The skin, kidneys, and eggs are adapted to conserve water.

  3. Crocodilians and Allies • Crocodiles have a • 4-chambered heart, unlike most reptiles. • They have leathery armor that serves as a protection. • With muscular tails; strong webbed feet; and sharp toothed jaws; these reptiles are the ultimate predators in the water.

  4. Tuataras • Often called a “living fossil”. • Only can be found on the islands of New Zealand. • It is the only survivor of a large group of reptiles that roamed the dinosaurs over 250 million years ago. • Unlike lizards, Tuataras don’t have ear openings, and they also have a single row in the lower jaw that fits between two rows of teeth in the upper jaw.

  5. Snakes • Over 3,000 different species. Measuring from a few inches to over 33 feet. • Different snakes have evolved into different ways of living (locomotion, defense, obtaining food, etc.). • Snakes are known for having a single elongated lung, and having no legs. • All snakes are carnivores.

  6. Lizards • They are the largest group of living reptiles. • With more than 4,000 species. • From less than 18 mm. to over 10 ft. in size. • Can survive in any conditions, except for extremely cold weather.

  7. Turtles and Tortoises • There are 293 different species. • The only vertebrates that have a shell made of ribs fused with bones. • Different shells differ to different needs. • In some species, newborns may have the survival rate of 1 out of 50,000.

  8. Difference with Amphibians • Unlike reptiles, most amphibians need to have a water source at all times. • Also, reptiles have scaly skins while amphibians have smooth and slippery skin. • Unlike amphibians, reptiles can spend their entire lives on dry land. • For amphibians, they spend their beginning lives in the water, spend adulthood on land, and come back to the water to reproduce. • For aquatic reptiles, it is the complete opposite. The reptiles spend most of their lives in water, and come to land to reproduce.

  9. Skeletal Structure of a Reptile

  10. The End!!!!!