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Blume Ch. 12.3 Reinforcment

What are the two types of worms? Roundworms and flatworms.
Are worms vertebrates or invertebrates? Invertebrates
What kind of symmetry do worms have? Bilateral
How many tissue layers do worms have? Three
What type of worm was the first to evolve bilateral symmetry? Flatworms
What are two types of parasitic flatworms? Tapeworms and flukes
What kind of organisms are planarians? Free-living
Roundworms were the first to evolve what? A digestive system with a mouth and anus
What kind of round worm attacks dogs? Heartworms
What group of worms are roundworms known as? Nematodes
How does a tapeworm eat? It absorbs food that is digested by the host
What is the most widespread disease caused by flukes? Schistosomiasis
What ways do roundworms help humans? They eat insects, kill ticks that cause Lyme disease, and provide nutrients for the soil
What is the life cycle of a fluke? The male deposits sperm in a female, the female lays eggs, the eggs leave the host through urine, if they're in water they infect snails,they lave the snail, and burrow into a new host.
Created by: c13ell