What characteristic is responsible for the branching off of the mollusks from earlier animals?
coelomates
What level of organization do these organisms demonstrate?
organ system level
How many tissues layers do these organisms have?
triploblastic
What is the shell made of?
calcium carbonate shell
What three body parts do they all have?
muscular foot (movement)
visceral mass (internal organs)
mantle (secrete a shell)
What structure do most of these animals have?
radula
When did they show up in the evolutionary history?
early Cambrian
Where are they found?
Ocean
What phylum is this in?
What is it called?
Phylum: Mollusca
Radula
Type of digestive system
Alimentary Canal
Type of Excretory System
Metanephridia
Type of Respiratory system
gills or lungs
Type of nervous system
paired cerebral ganglia
Type of Body Cavity
Eucoelomate
Type of Asexual Reproduction
none