12C-Flatworms & Roundworms Flashcards
True or false: the planarian is a parasitic flatworm
False. The planarian does not depend on other organisms for survival. It is not a parasite.
What phylum do flatworms belong to?
Platyhelminthes
How many longitudinal nerves does a planarian have?
Two. They run down each side of the body
The simple brain of many invertebrates is called a ___________.
Ganglion
How does a planarian eat?
The planarian eats by extending a muscular tube called a PHARYNX through the mouth and sucking food into the intestine.
Planarians reproduce asexually by _________.
Regeneration. If a planarian is cut in half, each half can grow into a new planarian.
What phylum includes roundworms?
C. Nematoda
Where does the adult ascaris normally live?
In the intestines of various animals (parasite).
Why is it important to thoroughly cook meat before eating it?
Because tapeworms are a common parasite found in animals. Cooking the meat of these animals before eating it will kill the tapeworms.
List three types of parasitic worms
Hookworm, trichina worm, and roundworms
What is a stimulus?
Something that causes a reaction in an organism.
What type of symmetry does a planarian have?
Bilateral symmetry.
This means there are two equal sides on the animal. One side is like a mirror image of the other side.
