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Section 2

Section 2 . Amphibians and Reptiles. Amphibians. Amphibians lead a double life. They spend half of their lives in water and the other half on land. Examples of amphibians include frogs, toads, newts, and salamanders.

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Section 2

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  1. Section 2 Amphibians and Reptiles

  2. Amphibians • Amphibians lead a double life. They spend half of their lives in water and the other half on land. • Examples of amphibians include frogs, toads, newts, and salamanders. • Amphibians are Ectoderms (cold-blooded) When temperatures become too cold they go into hibernation. • Estivationis when temperatures are very warm and amphibians wait until they cool down to become active.

  3. Types of Amphibians

  4. Amphibian Characteristics • Tadpoles use gills to breathe underwater • Frogs and Toad use lungs to breathe on land • Amphibian hearing and vision is adapted to life on land. Their large eyes on the top of their head can be seen sticking out of the water looking for prey. • All amphibians has slimy skin that keep them moist and not dry out

  5. NOTE CHECK • How do frogs deal with changing temperatures? • Why does an amphibian need slimy skin?

  6. METAMORPHOSIS • They go from a jelly like egg to a tadpole to a froglet to an adult. • Tadpoles have tails, no arms or legs and live underwater • A froglet still has a tail but as the legs grow that soon disappears. • An adult frog now has lungs, 4 legs and no tail. • Amphibians depend on water for reproduction

  7. REPTILES • Reptiles are adapted to life on land. • They do not depend on water for reproduction • Reptiles all have DRY scaly skin. (They are NOT slimy) • Reptiles are also ectothermic (cold-blooded) • Examples include snakes, lizards, turtles, tortoise, crocodiles and alligators

  8. EXAMPLES OF REPTILES

  9. REPTILE ADAPTATIONS • All reptiles have lungs and breathe air • Reptile reproduce internally and their eggs are leathery. This amniotic egg has a moist protective environment that provides nutrients for the baby developing inside it. • When reptiles hatch they are fully developed. Temperature can control weather the babies will become males or females.

  10. Snakes and Lizards • These make up the largest group of reptiles • Lizards and snakes have an organ on the roof of their mouth that senses molecules collected by their tongue. In other words, they smell with their mouths! • Lizards have eyelids, four legs and a tail while snakes have no eyelids, no legs but have a tail. • Snakes don’t have ears, they feel vibrations on the ground

  11. TURTLES VS TORTOISE • Both turtles and tortoises have a hard shell protecting their bodies. • Turtles had modified feet or flippers with claws for digging. They can pull their legs and head inside the shell. They commonly live in ponds. • Tortoises have 4 real legs used for walking and cannot pull themselves into their shell. They commonly like in deserts.

  12. ALLIGATORS VS CROCODILES • Both alligators and crocodiles have a mouth full of sharp teeth used for catching prey animals and commonly live in or around water. • Alligators have a more rounded mouth and live in warmer climates such as the southern united states. • Crocodiles are much larger then alligators, have a more pointed mouth, their teeth stick out when their mouths are closed and live in places such as Africa and Australia.

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