Flatworms Science Investigation
By Shannon, Emily and Brian.L
Appearance and Behaviour
Flatworms are invertebrates, they have no skeleton in their body. They have tiny bristles called cilia which help them move faster. They have got 3 cell layers in total, which are the endoderm, the mesoderm and also the ectoderm. (Diagram 2 below)
Although the flatworms are flat and look really simple, they have some advanced bodies structures compared to some other animals.
Flatworms don't have a respiratory system or circulatory system, but they do have a really cool little digestive system. Many species of flatworm uses a mouth to eat, however most species of flatworms have no Anus (butt). The problem with no anus is that the stuff you don't digest goes out the mouth when you're done.
Prey and Predators
However they have just as much predators, for example, tadpole, crustaceans, small fish and aquatic insects including dragonfly naiads, diving beetle and others.
This is a flatworm. (it looks Disgusting)
Flatworm's 3 layer diagram
In every flatworm there is 3 layers, the ectoderm, endorm, and the mesoderm.
Flatworm Bottom Diagram
This is the bottom part of a flatworm diagram.
Common Types of Flatworms
They can be found in shallow waters in pond, lake, stream. To travel to different parts of water they can move by following the stream or they can migrate by larger animals.