Porifera
defining features:
No mouth
eat through pores on their outer walls
filter water as it is pumped through their body
example: sponges
Cnidaria
defining features:
armed with stinging cells called nematocysts
example: box jellies, aneneme
Arthropods
defining features:
jointed legs
made of three parts- head, throat, abdomen
most successful group- lives on land and water
bilateral symmetry
open circulatory system
exoskeleton
examples: crabs/ all insects
arthropods class: crustacean
two antennae and 3 pairs of mouthparts
hard exoskeleton made of calcium
examples: lobster, shrimp, krill, brine shrimp, copepods
Mollusks
Defining features:
soft bodies covered by a hard exoskeleton
4 parts- foot, mantle, shell, & radula
classes:
Gastropods
Bivalve
Cephnalopods
Gastropods
defining features:
one shell
moving using muscular foot
examples: snails, welk, limps, conch
Bivalve
defining features:
two shells
use their muscular foot to open and close their shell and dig
have a siphon which is modified radula- used for filter feeding
examples: claims, muscles, oysters
cephalopods
defining features:
head foot
Chromatophores
examples:squid, octopus, cuddle fish