chapter 39: fishes

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intro to vertebrates

types of vertebrates

lampreys and hagfishes (class agnatha)

sharks, rays, and skates (class chondrichthyes)

bony fishes (class osteichthyes)

amphibians (class amphibia)

reptiles (class reptilia)

birds (c;ass aves)

mammals (class mammalia)

-paired fins give the fish more control in their swimming-

-origin of jaws maybe evolved from gill arches-

characteristics of fish

streamline shape

muscular tail

lateral line system

gills

vertebral column (backbone)

lateral line system- consists of a line of ciliated sensory cell that allows the fish to feel vibrations in the water

-sharks have very well developed senses-