Protozoan: meaning, definitions and examples

biology term

A protozoan is a single-celled organism that belongs to the kingdom Protista. They are largely microscopic and can be found in various habitats such as freshwater, saltwater, and soil. Protozoans display a wide diversity in form and function, and often exhibit motility through means such as flagella, cilia, or pseudopodia. Many protozoans are free-living, while others can be parasitic, causing diseases in humans and animals. Their study is crucial for understanding ecosystems and the role of microorganisms in health and disease.

protozoon, single-celled organism

Examples of usage

• Protozoans like amoebas move using pseudopodia.

• Malaria is caused by a protozoan parasite.

• Scientists study protozoans to learn about cell behavior.

• Some protozoans are key indicators of water quality.

• Giardia is a common protozoan that affects gastrointestinal health.