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Chapter 27 Test

QuestionAnswer
What are the three embryonic germ layers of flatworms? ectoderm, endoderm, mesoderm
What is a coelem? a fluid filled body cavity lined with tissues derived from mesoderm
Who has a coelem? annelids
Who does NOT have a coelem? flatworms do not and roundworms have a fake coelem
Describe tapeworms long, flat and parasitic. adapted to life inside their hosts
Describe tapeworm's digestive system they have no digestive tract
Describe earthworms land dwelling annelids; take in oxygen and give off carbon dioxide
How do flukes infest their hosts? they burrow inside exposed skin
How are flatworms and roundworms different? roundworms have a digestive tract with two openings
How are filarial worms transmitted? from one host to the other through biting insects, especially mosquitos
Which worms usually infect puppies? ascarid worms
Describe annelids segmented bodies; true coelem; 2 opening digestive tract
Annelids have a well developed what? nervous system
How do annelids reproduce? sexually
What worms are hermaphrodites and what does this mean? earthworms and leeches; each worm produces both sperm and egg
What are the two muscle groups that annelids have? longitudinal and circular
What are the parts of a mollusk? foot, mantle, shell, and visceral mass
What are the groups of mollusks? gastropods, bivalves, and cephalopods
Created by: fosterw
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