Nematoda - The phylum Nematoda classifies about 80,000 known different species, while some scientists believe there is reason to believe that there are about 1,000,000 different species that can be classified as Nematoda. The species in Nematoda with the most developed nervous system is the roundworm. Their nervous systems really vary depending on the species.
Roundworms - A roundworm has two nerve cords that transmit impulses throughout the roundworm. These nerve cords run along the ventral side. Sensory structures at the anterior end are called amphids, while sensory structures at the posterior end are called phasmids.
Threadworms - Threadworms have a very similar nervous system to roundworms and eelworms that are very characteristic of the Phylum Nematoda.
Eelworms - Eelworms nervous system is very simple and it can even be described as it only having nerve cells that transmit all the info that they need.
Roundworms - A roundworm has two nerve cords that transmit impulses throughout the roundworm. These nerve cords run along the ventral side. Sensory structures at the anterior end are called amphids, while sensory structures at the posterior end are called phasmids.
Threadworms - Threadworms have a very similar nervous system to roundworms and eelworms that are very characteristic of the Phylum Nematoda.
Eelworms - Eelworms nervous system is very simple and it can even be described as it only having nerve cells that transmit all the info that they need.