Appearance: Roundworms have a smooth, cylindrical body that tapers at both ends. They are usually pale white or light brown in color. The adult roundworms can measure up to several inches in length, depending on the species. The worms have a mouth at one end, which they use to feed on the host's nutrients, and a reproductive system that allows them to produce eggs that are excreted in the host's feces.
Lifecycle: The lifecycle of a roundworm begins when eggs are passed in the feces of an infected host. These eggs can survive in the soil for extended periods and are ingested by a new host through contaminated food, water, or soil. Once inside the new host, the eggs hatch into larvae, which then migrate through the host's tissues, eventually maturing into adult worms in the intestines. The adult worms then reproduce, continuing the cycle.