The Nematoda consists of species of roundworms and are very abundant and can be found almost everywhere. In fact, you can find nearly a million individual Nematodes in a square yard of soil! It is very hard to detremine the species Nematodes because of how indifferent they all are. They are either larger or smaller, some microscopic. Nematodes are characterized by an external (outer) layer of cuticle, a strong and flexible noncellular layer, that is secreted by the hypodermis below it.
Although there are so many free-living nematodes, they tend to be microscopic and therefore unknown to all but the scientists who study them. There are however a large number of nematodes that are parasitic on a wide range of animals and plants, these are rather better known than the free-living forms. These parasitic forms have major economic and health influences in parts of the world where they are found.
Although there are so many free-living nematodes, they tend to be microscopic and therefore unknown to all but the scientists who study them. There are however a large number of nematodes that are parasitic on a wide range of animals and plants, these are rather better known than the free-living forms. These parasitic forms have major economic and health influences in parts of the world where they are found.