The document summarizes the characteristics of mollusks. It discusses the three main classes of mollusks - gastropods, bivalves, and cephalopods. Examples are given for each class, with gastropods including snails, bivalves including clams and oysters, and cephalopods including squid and octopi. Key features of mollusks are described like their mantle, gills, muscular foot, and adaptations like shells and eyes.

1. Mollusks are soft-bodied animals
with a hard protective covering.

2. There are many
types of mollusks,
including clams,
oysters, snails,
squid and octopi.
There are many
Mollusks that we
eat!

3. The Mollusk Phylum has three
Main classes:
4. Gastropods (ex. - snails)
2. Bivalves (ex. - clams)
3. Cephalopods (ex. - squid)

4. Mollusks have a mantle, which is protective tissue
Covering its body. They breathe using gills, and they
Move using a muscular foot.

5. One advancement that mollusks have
is an open circulatory system.
The blood is not always inside of veins.

6. Gastropods(snails) have adapted to life on land.
This is a big step!
Most gastropods are covered with a protective shell.
Many have eyes.

7. Gastropods use a radula, a rough tongue,
to eat by scraping off food.

8. The next class of mollusks is bivalves,
which includes clams and oysters

9. Bivalves are covered by a hard protective
Hinged shell, like this giant clam below.

10. The last class of mollusks is cephalopods,
Which includes octopi and squid.
Cephalopod means “head-foot”.
Can you see why it has this name?

11. Cephalopods have many advancements:
3. Closed circulatory system (blood always
within heart or veins)
2. A foot divided in to tentacles
3. A well-developed nervous system with eyes

12. Fact or fiction?

13. Here is a photo of a real giant squid.

14. The squid in the previous picture measured
50 feet long and weighed 5000 lbs.! It’s eyes
would be almost the size of a soccer ball.
And here’s an interesting fact….in the water,
Giant squid are “Horace Mann” maroon in
color. Perhaps we should reconsider
our mascot?