Classes of Worms and Their Examples

Study Notes

Oligochaetes: Commonly known as earthworms, they play a vital role in soil aeration and nutrient cycling.
Hirudinea: Includes leeches, typically found in freshwater environments; used in medical applications such as bloodletting and treatment of certain conditions.
Polychaetes: Example includes bloodworms; characterized by having numerous bristle-like projections called chaetae, often found in marine habitats.
Chromadorea: This group includes pinworms, which are common intestinal parasites affecting humans, especially in children.
Enoplea: Notable example includes capillaria, which can infect various organ systems and is usually transmitted through contaminated food.
Turbellaria: Comprised mainly of planaria, these free-living flatworms are known for their regenerative abilities and complex nervous systems.
Trematoda: Known as liver flukes, these parasitic flatworms inhabit the liver of their hosts and can cause significant health issues.
Cestoda: Includes tapeworms, which are long, flat parasites residing in the intestines of host animals and can lead to malnutrition and other health concerns.