nematodes

Nematodes, also known as roundworms, are a diverse group of tiny, thread-like worms found in various environments worldwide—soil, water, plants, and animals. Many nematodes play essential roles in ecosystems, such as decomposing organic matter and nutrient cycling. However, some are parasitic, infecting plants, animals, and humans, causing diseases and health issues. They have a simple, cylindrical body with a pointed end and are often microscopic or just visible to the naked eye. Nematodes reproduce rapidly, making them significant in agriculture and medicine, either as pests or as models for scientific research.