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Transcript 
KINGDOM ANIMALIA
INVERTEBRATES
CHAPTERS 32-38
ANIMAL CHARACTERISTICS
for verts and inverts
• Motile during some stage of the organism
life
• Multicellular
• Heterotrophic
• Mostly sexual reproduction
SPONGES
Phylum Porifera
COMB JELLIES
Phylum Ctenophora
FLATWORMS
Phlyum Platyhelminthes
ROUNDWORMS
Phylum Nematoda
ROTIFERS
Phylum Rotifera
MOLLUSKS
Phylum Mollusca
SEGMENTED WORMS
Phylum Annelida
ARTHROPODS
Phylum Arthropoda
Subphylum Crustacea
Subphylum Chelicerata
Subphylum Myriapoda
Subphylum Hexapoda
Class Insecta
ECHINODERMS
Phylum Echinodermata
INVERTEBRATE CHARACTERISTICS
AND TRENDS
•
•
•
•
•
•
•
•
asexual  sexual reproduction
Assymmetry  radial  bilateral symmetry
No tissues  2 layers  3 tissue layers
no body cavity  pseudo body cavity  true body
cavity
protostomes  deuterostomes
circulatory systems
open: blood pumped into open cavity 
closed: blood vessels form loop
nerve net  simple nervous system 
cephalization
No segmentation  segmentation 
segmentation with appendages
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