mollusks and arthropods

mollusks

foot---
mantle
shell T body plan
visceral mass--
herbivores-----
carnivores
filter feeders Feeding
deteritores
parasites------
snail
slugs
radada
sharp jaws to eat prey--- octopi

arthropods

segmented body
exoskeleton- made of chitin
jointed appendages
well developed nervous system
have a brain
central switch board
sophisticated senses
use muscles
contractions certain stretch or extend
Internal fertilizations

Porifera

Multicellular
Heterotrophic
No cell walls
Few specialized cells
asymmetrical
Spiraled
skeleton
filter feeders
rely on movement out of water
no nervous system
sexual
asexual

Cnidarians

soft bodied
cellular metabolism
hydrostatic skeleton
muscle contractions
sexual
asexual

Animalia

Heterotrophs
multicellular
eukaryotes
95% invertebrate
5% vertebrate
all breath oxygen
excretory systems
sexual reproduction
Bilateral symmetry = mirror image sideways
Radial symmetry- circular
asymmetrical- no symmetry

Sponges

live in one place
eats smaller organisms that enter them through pores
reproduce asexually
male and female

annelids

segmented bodies
true coelum lined with tissue derived from mesoderm
filter feeders
predators
crop
gizzard
closed circulatory
aquatic annelids breathe through gills
excrete through-nephridia
two major groups of muscles
hydro skeletons
oligochaets
leeches
polychaets

Echinoderms

Pentamorous radial
Present coelom
one way-two opening digestion system
Sexual
some asexual
External fertilization
separate sexes
few hermaphrodites

mollusks and arthropods

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