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Warm up
1. What characteristics are similar between fish and amphibians?
2. What characteristic do both of these animal phyla share with all chordates?
PREVENT WATER LOSS to live on land…Dry, hard, plate-like scales
Thick skin
Amniotic egg
Egg Comparison…
Atrium
ventricle
three-chambered heart Double-looped circulatory system
ECTOTHERMIC-Must maintain body temp using surroundings
Feathers for flightDifferent types for different jobs
Bonesthin and hollow
Amniotic egg
ENDOTHERMICHigh body temps (over 104oF)High metabolismPant to cool!
Eat a lot
4 Complete Heart ChambersDouble-looped circulatory system
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