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20 Cards in this Set
- Front
- Back
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Phylum Echinodermata
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"spiny-skinned"
-larva: bilateral adult: radial -endoskeleton: Calcium carbonate plates & spines -H2O vascular system: network of fluid-filled canals that function in locomotion, feeding, & gas exchange. -coelom and tube w/in a tube |
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Phylum Chordata
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-notochord: dorsal longitudinal rod
-dorsal, tubular nerve cord -pharyngeal slits (became jaws) -postanal tail |
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Subphylum Urochordata
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"tunicates"
-the 4 charact of the phylum are present in larva form. |
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Subphylum Cephalochordata
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"lancelets"
-4 charac are present in adult form |
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Subphylum Vertebrata
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-Vertebral column (replaced notochord during embryonic dev)
-Vertebrae: cartilaginous/ bonysegments -Cranium |
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agnathans
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"w/o jaws"
-hagfishes |
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Class Cephalaspidomorphi
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-lampreys
-no jaw -cartilaginous skeleton -notochord |
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Gill arch skeleton
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evolution of jaws.
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Class Chondrichthyes
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-"sharks"
-cartilaginous w/jaws -paired jaws & 2 pairs of fins -skin has placoid scales |
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Class Actinopterygii
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Bony fishes
paired fins rays made of cartilage or bone bony scales |
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sarcopterygians
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lungs
fleshy, lobed fins fins: central appendages w/bones & muscles |
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Ray-finned fishes
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swim bladder: air sac that helps regulate buoyancy
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Class Amphibia
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-tetrapods: land vertebrates
-1st tetrapods: labyrinthodonts -Reproduction in water -lungs & skin for gas exchange |
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Amniotic egg
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-amnion: membrane that forms a fluid-filled sac around embryo. Serves as a shock-absorber: cushioning embryo.
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Class Reptilia
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-female reptile secretes a leathery shell
-internal fertilization -amnion surronding embryo -scales -ectothermic |
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Class Aves
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-feathers (decrease H2O & heat loss)
-lay eggs -scales on feet -hollow bones |
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Class Mammalia
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-hair: insulating body
-mammary glands:produce milk -differentiation of teeth -3 middle ear bones: conduct vibrations -endotherms |
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Subclass Monotremes
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-duckbilled platypus
-females lay eggs that stay in pouch. |
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Subclass Marsupials
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young marsupial attatches its mouth to mammary gland nipple
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Subclass placenta
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placenta: organ of exchange b/t developing embryo & mother.
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