Download 7) Worms

3 Types of Worms
1) Flatworms
2) Roundworms
3) Segmented worms
1) Flatworms – page 504
*Have long and flattened bodies.
*Simple digestive system, body has only one opening.
*Most flatworms are parasites that depend on other living things to get food and shelter.
* Hosts are the living things that a parasite gets food and shelter from.
* Tapeworms are a type of flatworms that are parasites.
2) Roundworms – page 505
*Bodies are round and described as a tube within a tube.
*has a more complex digestive system
*Heartworms are an example of roundworms that harm dogs.
* are the most widespread animal on Earth. Billions can live in one acre of soil.
3) Segmented worms – page 508 and 509
*Body is made of repeating rings or segments that make the worm flexible.
*Has a closed circulatory system
*Earthworms have over 100 body segments.
*has a complex digestive system with two openings in the body.