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Chapter 5: Vertebrates

Chapter 5: Vertebrates. Vertebrates. Animals with backbones All vertebrates have an endoskeleton, an internal support system that makes the animal more flexible and easier to move. The 5 groups are birds, fish, amphibians, reptiles, and mammals. Fish.

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Chapter 5: Vertebrates

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  1. Chapter 5: Vertebrates

  2. Vertebrates • Animals with backbones • All vertebrates have an endoskeleton, an internal support system that makes the animal more flexible and easier to move. • The 5 groups are birds, fish, amphibians, reptiles, and mammals.

  3. Fish • Have gills, a respiratory organ that filters oxygen dissolved in water. • Have sensory organs for taste, odor, and sound. • Female fish lay eggs that are fertilized by a certain male. Eggs develop and hatch on their own

  4. Amphibians • Lay eggs in water • Smooth, moist skin • Skin works as a respiratory organ only when wet. • Can live in moist land environments as adults. • Ex: Frogs, toads, salamanders

  5. Reptiles • Tough, dry skin covered by scales • Obtain oxygen from air with lungs • Lay eggs, which have shells, on land. • Ex: snakes, lizards, alligators

  6. Ectotherms • Amphibians and reptiles are ectotherms, animals whose body temperatures changes with environmental conditions. • For example, on a cool day, a tortoise’s body will be cooler than it is on a hot one.

  7. Birds • Have feathers and beaks • Have a pair of scaly legs and a pair of wings • Their eggs have hard shells. • Mothers sit on their eggs to keep them warm (incubation) • Hollow bones

  8. Mammals • Have hair or fur • Contain body fat to store energy or maintain body temperature • Females produce milk to feed their young • In most mammals, offspring develop inside the female’s body

  9. Endotherm • Bird and mammals are endotherms, which means their body maintains a constant body temperature. • Birds and mammals have many adaptations to help maintain body temperature

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