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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

Section 2

Amphibians and Reptiles

  • 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.
amphibian characteristics
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
note check
  • How do frogs deal with changing temperatures?
  • Why does an amphibian need slimy skin?
  • 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
  • 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
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.
snakes and lizards
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
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.
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.