A Differnet Type Of Worm
Worms
Worms on this planet are very diverse and do many things. 3 kinds are the Platyhelminthes, the Nematoda, and the Annelida. These worms phylas contain some come worms that we know. Like flatworms, roundworms, and earthworms. There are parasitic and non-parasitic kinds in these phylas. Here are some ways they are different.
Platyhelminthes
This form of worm as a "flatworm". They have three tissue layers which are ectoderm, endoderm, mesoderm. They are bilaterally symmetric and have no body cavity. There are parasitic and non-parasitic forms of this worm. A non-parasitic is Fluke. It swims and eats little species. The parasitic Liver Fluke goes in the liver of its host and sets up home where it will suck out the nutrients it needs.
Nematoda
These are more commonly known as "roundworms". They are bilaterally symmetrical and also know as "pseudocelomates" They have a hollow body cavity and a digestive tract that has a mouth and a anus. There is no non-parasitic form. Some parasitic forms are the Ascaris, hookworm, and pinworm that all feed off its host.
Annelida
More known as "earthworms" these worms are probably the safest. They live in soil and eat dirt. They are bilaterally symmetrical and also have 3 body tissues. They have a full body cavity and a full circulatory system. The non-parasitic form is the earthworm. There are no parasitic forms.