Chordates Animal with a spinal cord protected by a backbone.

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Presentation transcript:

Chordates Animal with a spinal cord protected by a backbone

Amphibians Examples: frog, toad, salamander, newt

Amphibian Cold blooded (same temp as outside) Young breathe with gills/skin Adult breathes with lungs/skin Skin is thin, moist Circulatory system: closed (has veins and arteries)

Amphibian Lay eggs in the water Eggs are jelly mass of ’s of eggs Body development: metamorphosis from egg to tadpole to adult

Giant Cane Toad Has poison glands so other organisms cannot eat them Introduced to Australia in 1935 to eat Cane beetles (pest) Population exploded, because they kill all predators with poison. Can’t get rid of them now.

Reptiles Examples: snake, turtle, alligator, crocs, lizards

Reptiles Temp: cold blooded Young breathe with lungs Adult breathes with lungs Skin: dry, scaly

Reticulated python at American history museum (nyc)

Reptiles Closed circulatory system Lay eggs in mud, sand, nest Eggs: leathery, Body development: no metamorphosis

Watching reptiles eat

Fish Cold blooded Young breathe with gills Adults breathe with gills Skin: slimy, scaly (usually)

hagfish

Fish Closed circulatory system Lay (jelly) mass of eggs in water 100’s-1000’s Body development: no metamorphosis

Video clips mydas_09c.html?movietype=wmMed green sea turtle laying eggshttp:// mydas_09c.html?movietype=wmMed feeding poisonous dart frogshttp:// snake eating a froghttp:// tree frog, not so great