Nematoda

Nematoda, also known as roundworms, are a diverse group of thin, cylindrical worms found in various environments worldwide, including soil, water, and as parasites in plants and animals. They have a simple body structure with a complete digestive system, a nerve cord, and muscles that allow movement. Many nematodes play crucial roles in ecosystems, such as decomposing organic matter and controlling pest populations. Some species are parasitic to humans, animals, or crops, causing health issues or crop damage. Despite their simplicity, nematodes are important for ecological balance and scientific research.