Nematodes, commonly known as roundworms, are a diverse group of organisms found in various environments, including soil, freshwater, and marine habitats. They play crucial roles in ecosystems, such as decomposing organic matter and serving as food for other animals. Some nematodes are beneficial, while others can be harmful, causing diseases in plants and animals.
These microscopic creatures have elongated, cylindrical bodies and can range in size from less than a millimeter to several meters long. Nematodes are important in scientific research, particularly in studies related to agriculture and ecology, due to their impact on soil health and crop production.