Lesson 14 Gastropods & Worms Flashcards
What are the meanings of the two Greek words that form the name “Gastropoda”?
They mean “belly” & “foot”
Why do slugs & snails produce mucus?
The snail’s mucus not only helps it crawl around; it is also a great defense.
How do slugs & snails eat?
they eat by scraping food into their mouth with their radula
Name the three basic types of worms.
flatworms, roundworms, segmented worms
How does a tapeworm get inside a dog or a cat?
The dog or cat eats an infected flea.
Explain the tapeworm life cycle.
When an infected animal (or egg) is eaten by another animal, that animal becomes infected. Once inside its final host, the tapeworm inserts inself into the intestine, attaching itself to the intestinal wall. Its skin absorbs the nutrients form the already digested food in the intestines. As the tape worm continues to absorb nutrients and grow, it begins to add segments to its body. Each segment produces its own eggs. When the segments leave the body, the eggs can be eaten by animals to start the process all over again.
Which fo the three basic worm types are pinworms?
roundworms
What are some ways you can avoid getting parasites?
Wash your hands, especially after touching animals. Also, cook meat thoroughly.
What kind of worm is an earthworm?
segmented worm
Why are earthworms important to people?
They make soil more fertile
How do earthworms move from place to place?
The earthworm has hristles called setae on its underside. When the worm decides it need to go somewhere, it makes itself as long as it can, then it anchors its front setae into the soil. After this, it releases its back setae and pulls its tail end forward, making itself short & thick. Once the tail end is set in place, it anchors its rear setae into the soil. The front setae release, and the owrm stretches out, propelling the front end forward, bumping against the solid dirt or tunneling into it as it stretches out farther & farther. Once the dirt is moved, it releases the back setae & starts over.
