2. Vertebrates and Invertebrates By the Vidster

3. Vertebrates  Vertebrates are animals with backbones.  These can be made into smaller groups.  These are Mammals, Reptiles, Amphibians, Birds and FishMammalsReptilesAmphibians  Vertebrates are animals with backbones.  These can be made into smaller groups.  These are Mammals, Reptiles, Amphibians, Birds and FishMammalsReptilesAmphibians

4. Mammals  Humans are mammals. The word mammal comes from the Latin mamma, meaning breast, because female mammals produce milk to nurse their babies. Nearly all mammals give birth to live young, and all are warm-blooded, maintaining a near-constant body temperature regardless of environmental conditions. They are vertebrates and use lungs to breathe air and are the only animals that grow hair. Mammals probably appeared on Earth some 200 million years ago. Click here for mammal facts Back To Verte- Brates

5. Mammal Hall of Fame Tallest Mammal-Giraffe, can reach upto 18ft. Biggest Mammal-Blue whale can weigh 100t. Smallest Mammal-Pygmy shrew. < 2 Inches Mammal with longest hair-Us(unless monkeys are reading this) Tallest Mammal-Giraffe, can reach upto 18ft. Biggest Mammal-Blue whale can weigh 100t. Smallest Mammal-Pygmy shrew. < 2 Inches Mammal with longest hair-Us(unless monkeys are reading this) Back to Vertebrates

6. Reptiles  Reptiles have been around for 300 million years, and during the age of the dinosaurs, they ruled the Earth. Those days are long gone, and those giants have vanished, but some 6,500 species of reptiles still thrive today. Crocodiles, snakes, lizards, and turtles are all reptiles. Most reptiles live on land, and most lay eggs. They are vertebrates, and, unlike any other animals, are covered in scales. They are cold-blooded, and regulate their body temperature by seeking or avoiding the sun's heat. Back to Vertebrates

7. Amphibians  Amphibians lead double lives ﾑ one in water and one on land. Many begin life with gills, then develop lungs as they age. They are vertebrate animals that include frogs, toads, salamanders, and newts as well as odd, wormlike caecilians (seh-SILL-yuns). They are cold-blooded, using the environment to regulate their body temperature. Early amphibians were the first animals to leave the sea and venture onto land, forming a crucial link from fish to terrestrial reptiles.