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20 Cards in this Set

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