1. March Through the Animals

2. Porifera - Sponges
Pores
Collar cells
Amebocytes
Spicules
Sessile

3. Cnideria hydra, jellyfish, coral, anemone
Nematocysts
Gastrovascular cavity
Tentacles
Sessile or free living

4. Platyhelminthes (Flatworm) Tapeworm, Planaria
Gastrovascular Cavity
Pharynx
Eyespots
Cephalization
Hermaphroditic

5. Nematoda – Roundworms Vinegar Eel, Hookworm
Complete digestive system
Parasitic & free-living
Different sexes

6. Mollusca Snails, Clams, Octopus, Squid
All organ systems present
Mantle – secretes shell
Radula – scraping/cutting mouth part

7. Annelida Earthworm, Leech, Marine Worms
Body segmented
Setae – 4 pairs of bristles/segments
Closed circulatory system
Primitive brain
Nephridia – excretion
hermaphroditic

8. Arthropoda Chelicerata Spiders, Ticks, Scorpions
Exoskeleton
Specialized appendages
Chelicera – sting prey
Head thorax – abdomen
Book lungs
8 legs
8 eyes
Open circulatory system

9. Arthropoda Crustacea Crayfish, Lobster, Crabs, Daphnia, Barnacle
Exoskeleton
Specialized appendages
Mandables – specialized mouth parts
Head, thorax, abdomen
Gills
Compound eyes
Ventral nerve cord
Open circulatory system

10. Arthropoda Uniramia Insects, Centipedes, Millipedes
Insects – 6 legs
Exoskeleton
Head, thorax, abdomen
Segmented – centipede & millipede
Ventral nerve cord
Open circulatory system

11. Echinodermata Starfish, Sea Urchin
Calcareous skeleton
Water vascular system
Gas exchange, feeding, movement
Tube feet
Complete digestive system
Open circulatory system
Regeneration