1. Snail, oyster, squid, octopus, slug, chiton
Page 530
Phylum: Mollusca
Snail, oyster, squid, octopus, slug, chiton

2. Characteristics Soft body (yummy part!)
Muscular system: Muscular foot (movement)
Visceral mass (contains organs)
Most have a shell
Produced by the mantle

3. Have a true body cavity (coelom)
Reproductive System: Most reproduce sexually
Most have an open circulatory system
Not all blood moves in vessels
Excretory System: Nephridia

4. Three Main Classes Gastropoda --”stomach foot” --snails, slugs, conchs
--Respiratory system: gills
--have a tongue with teeth..radula
--Herbivore—eats plants

5. 2. Bivalvia “two shells” Clams, oysters, scallops, mussels
Filter feeders
Found in fresh
and salt water
Page 533 Eyespots

6. 3. Cephlapoda “head foot” Octopus, squid, nautilus, cuttlefish
Highly developed nervous system
CLOSED circulatory system

8. Predators
Can change color
Squirt ink for protection
Have eyes like us
Tentacles with suction cups
Squid = 10
Octopus = 8

9. The Chambered Nautilus
Chambered shell
Animal lives in outer chamber
Other chambers are filled with gas to control animal’s depth