What characteristic is responsible for the branching off of the segmented worms from earlier animals?
eucoelomates
What level of organization do these organisms demonstrate?
organ level system
How many tissue layers do these organisms have?
triploblastic
What is the name of the bristles seen on some of these animals?
satae
What is the name of the side feet seen in some animals?
parapodia
When do they appear in the evolutionary history?
516 mya early Cambrian
What habitats are they found in?
ocean and freshwater
Type of Digestive System
Alimentary Canal
Type of Excretory system
Metanephridia
Type of Circulatory System
no true heart
Type of Respiratory System
Parapodia
Type of Nervous System
pair of cerebral ganglia
Type of Body Cavity
Eucoelomate