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Lecture 11

Flatworms, Annelids, Nematodes & Mollusks

TermDefinition
No cavity Flatworms have this type of body cavity.
Gastropods Snails and slugs.
Bivalves Oysters, clams, mussels and scallops.
Cephalopods Squid, octopuses, cuttlefishes and nautiluses.
Penis Fencing Sexual reproduction performed by flatworms.
Hermaphrodites Flatworms are these where they produce both the sperm and the egg.
Proglottids A tapeworm is spread by these by breaking off and exiting the host in the feces.
Cephalopods (octopus) The most intelligent invertebrate.
Annelids Segmented worms are referred to as this.
Why are leeches able to suck so much blood from their victims without the victim knowing? Anesthetic in saliva.
How can leeches be used medically? Prevent blood clotting when reattaching fingers.
What is the foot of the cephalopods? Arms (tentacles).
What type of organism causes the disease Elephantiasis? Roundworms.
What kind of digestive system do earthworms have? Complete.
What type of circulatory system do earthworms have? Closed.
Do earthworms have a brain? Yes, simple.
How do clams move? Burrow in the sand.
How do (young) scallops move? Clap their shells.
Created by: bngrimes1995
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