Chapter 2: Mollusks
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What is an invertebrate with a soft, I segmented body often protected by a hard shell.
Mollusks
What organ does a mollusk have they use for crawling, digging or catching prey
A foot
What are some examples of a mollusk?
Clams, oysters, scallops, snails, squid
What is a this layer of tissue that covers a Mollusks internal organ
Mantle
How does a mollusk obtain oxygen
They have gills that remove oxygen from water
What type of circulatory system do Mollusks have?
An open circulatory system
Does blood always flow in blood vessels in a mollusk
No it does not
What type of body structure does a mollusk have?
Bilateral symmetry
How many openings does a Mollusks digestive system have?
2
Which is the largest mollusk group?
Gastropods
Where do Gastropods live?
Oceans, rocky shores, fresh water, and land
What is an example of a Gastropods
Snail slug
What type of shell can an Gastropods have?
Single exterior shell or no shell
How do Gastropods obtain food Herbivore? Carnivore?
Herbivore: eats only plants Carnivore: eat only animals Others are scavengers
Gatropods have flexible ribbon of teeth called
Radula
How does a Gastropods move
Slides on a foot
A second group of Gastropods is called a bivalve because it has 2 what
Shells held together by hinges or strong muscles
What are examples of bivalves?
Oysters or clams
How do bivalves obtain food?
They are filter feeders And most of them are omnivores
How does a bivalve move?
Float, swim, or use a foot
What protection does a bivalve use
Produces a smooth pearly coat around that irritants that may form a pearl
The last group of a Gastropods is called a cephalopod, where are they found?
The ocean
The cephalopod is the only mollusk with what type of circulatory system?
Closed
What are the types of cephalopod?
Octopus or squid