Vertebrates
vertebrates that spend part of their lives in water and part on land are called
amphibians
most primitive
sponges
worms and humans
bilateral
gives birth to partially developed offspring
marsupial
worms with flat bodies, 1 opening, simple eye
platyhelminthes
lizards, snakes, turtles, alligators and crocodiles are
reptiles
have mouths surrounded by tentacles
cnidarians
cnidarians like jellyfish & hydras
radial
fish, birds, amphibians, reptiles and mammals are what group of the 2 in the animal kingdom
vertebrates
simple digestive and nervous system
nematodes
Why can birds fly?
hollow bones
larges group of invertebrates
arthropods
divided along only 1 plane
bilateral
whales & humans
placental
clams & squids are
mollusks
produce mild to feed young
mammals
have bilateral symmetry, muscular foot, mantle and specialized organs
mollusks
type of body plan that has no definite shape
asymmetrical
lays eggs
monotreme
they have tubed feet, water pressure system to help them feed, breathe and move
echinoderms
how do fish breathe
with gills
without real tissues or organs
sponge
sponges
sponges, cnidarians, echinoderms, mollusks, arthropods
invertebrates
crabs & insects
arthropods