Segmented worms, Round worms, Flat worms Logan H.
Segmented Worms - An animal, such as the earthworm, whose body is made up of connected sections, or segments.
- Body is made up of segments
- circulatory system
- Five enlarged tubes act like hearts,
- Has a brain or nerve center
Adaptation - two sets of muscles enable the earthworm to move through the soil.
Roundworm - an animal, with a round tube like body, that has a digestive system with two openings
- Have a digestive system with two openings
- Has a tube like body
- Round body
- Muscles run length wise
Adaptation - whiplike muscles to get away from predators.
Picture from: http://www.thelifetree.com/roundworms.htm
Flatworm - An animal, such as a planarian, that has a flattened body, a digestive system with only one opening, and a simple nervous system.
- flattened body
- digestive system
- nervous system
- usually small
- stay out of light
- live in freshwater/saltwater
Adaptation - during the daylight they are usually found under rocks or freshwater environments.
Picture from: http://www.diverosa.com/categories/Flatworms.htm