Nematoda
Important Information
Roundworm(Caenorhabditis elegans): Round-bodied unsegmented ; spiny- headed worm.
The roundworm does not have a brain. It does have a circular nerve ring that surrounds the pharynx, which serves as the brain. It serves as the brain by its smaller nerves that run forward from a ring to supply the sensory organs to the head. This is all part of and happening on the anterior end of the worm. Through the whole body of the worm there are four nerves that lie on 3 surfaces: dorsal, ventral, and lateral. The ventral is the largest. The dorsal is responsible for motor control; the lateral are sensory. The vernal combines both functions
Threadworms: A very slender parasitic nematode, also known as a pinworm.
Thread worms basically have the same nervous system a the round worm considering their both worms. Like the roundworm the thread worm has two nerve cords that transmit impulses.
Eelworms: a small soil nematode that can be a serious plant and crop pest.
Approximately one-third of the cells in the eelworms' body are nerve cells.The system is made of clumps of nerve cells (called ganglia) in the head, tail, and scattered throughout the main nerve cord, which runs along the bottom of the worm’s body.
- 80,000 known species
- Most nematode species are dioecious, ,with separate male and female individuals. Dioecious reproduction is biparental
- The round worm is the most common of the species in this phylum
- Nematodes bodies are covered in sensors that provide a sense of touch. Some of these sensors there covered in are called Bristles and Papillae
Roundworm(Caenorhabditis elegans): Round-bodied unsegmented ; spiny- headed worm.
The roundworm does not have a brain. It does have a circular nerve ring that surrounds the pharynx, which serves as the brain. It serves as the brain by its smaller nerves that run forward from a ring to supply the sensory organs to the head. This is all part of and happening on the anterior end of the worm. Through the whole body of the worm there are four nerves that lie on 3 surfaces: dorsal, ventral, and lateral. The ventral is the largest. The dorsal is responsible for motor control; the lateral are sensory. The vernal combines both functions
Threadworms: A very slender parasitic nematode, also known as a pinworm.
Thread worms basically have the same nervous system a the round worm considering their both worms. Like the roundworm the thread worm has two nerve cords that transmit impulses.
Eelworms: a small soil nematode that can be a serious plant and crop pest.
Approximately one-third of the cells in the eelworms' body are nerve cells.The system is made of clumps of nerve cells (called ganglia) in the head, tail, and scattered throughout the main nerve cord, which runs along the bottom of the worm’s body.