Platyhelminthes
Important Information:
- Contains 20,00 species of invertabrae animals
- Usually called flatworms
- The flatworm has a very simple nervous sysem and it has two nerve chords running down each side.
- It also has two brains called gangila, whch are bundles of nerves.
- It has two eyes to sense light
Flatworms (Platyhelminthes)
A flatworm has a simple nervous system. It has two nerve chords running down each side of the worm. It has two brains called ganglia. The ganglia are bundles of nerves. The flatworm has two eyespots to help sense light.
Tapeworms (Cestoda)
A tapeworm had a similar nervous system to the flatworm as it had two nerve chords, two brains,and eyepots until it adapted then lossing its nervous system.
Fluke Worms (Trematodes)
A flukeworm has a nervous system that consists of anterior ganglia and three pairs of nerve chords. They are also hermaphroditic.