Frogs - Anatomy and Physiology

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• Frogs - Anatomy and Physiology

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Amphibians

• Amphibians are unique in their ability to live in
  both water and on the land.
• Amphibians are metamorphic, meaning they change
  structure during their life, from an egg, to a
  tadpole and eventually develop into a frog.
• Life as a tadpole is spent in the water, at which
  point they breathe through gills and dont
  possess limbs.
• Developing into a frog, tadpoles grow longer and
  form fins then legs, their tail becomes shorter
  and their gills are replaced by lungs.

• Frogs have moist skin through which gas exchange
  occurs as well as through lungs, and they can
  also secrete poison through their skin.

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Bufo marinus dissection

• Classification of a cane toad
• Kingdom Animalia
• Phylum Chordata
• Class Amphibia
• Family Anura
• Genus Bufo
• Species marinus
• Cane toads (Bufo marinus) are large, short
  amphibians with dry warty skin. They are
  grey/olive to brown above with a pale belly and
  have dark irregular spots. Cane toads possess
  venomous glands for defence. Adults are usually
  10-15 cm in length but can reach up to 23 cm.
  The species is feral in Australia, and is causing
  considerable habitat destruction and the loss of
  Australian native fauna species through poisoning
  and competition.