amphibians

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origin & evolution of amphibians

characteristics of amphibians

legs

lungs

"skin breathing"

partially divided heart

double loop circulation

types of amphibians

toad/frog (anura)

salamander (urodela)

caeillians (apoda)

charateristics of early amphibians

4 strong limbs developed from fins

breathed air from lungs and had large, sharp teeth

7 toes on each foot, present amphibians have 5 toes on each foot

*know anatomy of frog*

double loop circulatory system- heart to lungs back to heart then heart to rest of the body

-amphibians breath through their lungs and their skin-

parts of a frog brain

cerebrum

cerebellum

medulla oblongata

optic lobe

olfactory lobe