Chordates Flashcards

1
Q

Urochordata

A

Tunicates

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2
Q

Cephalochordata

A

Lancelets

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3
Q

Craniata

A

Hagfish, no back bone

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4
Q

Have Cranium and back bone

A

Lampreys

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5
Q

Gnathostomata

A

Jaws

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6
Q

Placoderms

A

an extinct fish have armor

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7
Q

Chondrichthyes

A

Cartilage fish, like sharks, above lampreys

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8
Q

Osteichthyes

A

Bony fish, active gills
have 2 groups:
Ray-finned: eel, trout
Lobe-Finned: lung fish, related to tetrapods

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9
Q

Amphibians

A

Double life, live on land and water, must lay eggs in water

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10
Q

Reptiles

A

have amnion !!!

1st true terrestrial vertebrates

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11
Q

endothermic

A

only birds and mammals

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12
Q

Lung

A

Amphibians, Reptiles and Mammals

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13
Q

Hearts

A

Fish:
Amphibians:3
Mammals, birds: 3

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