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20 Cards in this Set

  • Front
  • Back
sponges
porifera
2 layers of cells
sessile
no nervous system
spicules
hermaphrodites
fragmentation (asexual)
jellyfish
cnidarians
2 specialized layers w/ mesoglea
1st true multicellular
one opening digestive system
nerve net
nematocysts
2 stage life cycle
polyps sessile asexual
medusas oval and free swimming, sexual (hermaphro)
planaria
platyhelminthes
true organs
3 cell layers
bilateral symmetry
nerve ganglia
one opening
flame cells
hermaphroditic
regeneration
roundworms
nematoda
most numerous
bilateral symmetry
2 digestive openings
seperate sexes
psuedocoelom
ascaris
hookworm
filarial
trichinella
earthworm
annelida
segmented bodies
advanced circulatory system
true coelom
2 opening digestive system
crop gizzard intestine
nephridia
brain
parapodia
hermaphroditic
internal fertilization
snail
mollusca
mantle
nonsegmented
3 cell layers
true coelom
heart
2 opening syster
gills
kidneys
radula
exoskeleton
crayfish
crustacea
mandibles
2 pair antannae
2 body segments
cephalothorax
5 pair legs
claws called chelipeds
swimmerets
telson
exoskeleton
grasshopper
insecta
3 body segments
one pair antannae
one pair mandables
3 pair legs
2 pair wings on thorax
exoskeletons
spider
arachnida
2 body sections
no antannae
chelicerae (no mandibles)
4 pair legs
book lungs
spinnerets on tip of abdomen
exoskeletons
centipedes
millipedes
chilopoda 1 pair appendages
dilopoda 2 pair appendages
both have mandibles
exoskeletons
starfish
echinodermata
spiny skins
endoskeleton
bilateral then radial as adult
5 rays/arms
coelom
water vascular system
dermal broncheae
external feritilization
sexual
2 opening digestive system
lamprey
agnatha
jawless
parasite
uncovered gills
fins
ectothermic
sharks
chondrichthyes
skeltons of cartilage
ectothermic w/ scales
2 pair of fins
hinged jaws, uncovered gills
predators
good sense of smell
bass
osteichthyes
bony fish
salt and freshwater
bone skeletons, hinged jaws
ectothermic
2 pair lateral fins
2 dorsal fins
1 tail
ventral/anal fin
scales w/ slimy coating
sexual
frogs
amphibia
first to live on land
ectothermic
sexual
external fertilization
lay eggs
stages of development
snakes
reptilia
sexual
internal fertilization
external development
shelled eggs
laterally located legs
scaly skin-molting
hawk
aves
scaly legs
tough beak
external development
endothermic
bone skeleton
feathers
auxiliary airs sacs to increase exchange rate
platypus
monotremes
external development in shells
mammalia
endothermic
lungs
kangaroo
marsupials
partial internal and external development
mammalia
endothermic
lungs
humans
placental
young develop internally
fed milk produced by mother
endothermic
lungs