Segmented worms, also known as annelids, are a group of invertebrates characterized by their long, cylindrical bodies divided into segments. Each segment contains muscles and organs, allowing for efficient movement and flexibility. Common examples of segmented worms include earthworms and leeches. These worms play essential roles in ecosystems, particularly in soil health and nutrient cycling. They help aerate the soil and break down organic matter, which enriches the soil and supports plant growth. Segmented worms can be found in various habitats, including freshwater, marine, and terrestrial environments.