A protozoan is a single-celled eukaryote. They are included under the kingdom Protista.
The study of protozoa is called Protozoology. They are found in ponds, ocean, in moist soil, and in the cells and tissues of plants and animals causing diseases.
They range from 2-200 microns. Protozoans have specialized organelles. These organelles are used for movement, feeding, and other functions.
The types of protozoans are as follows:
Ciliates - Presence of cilia for locomotion
Example:Paramecium
• Flagellates - Presence of flagella for locomotion
Example:Euglena
• Pseudopods - Presence of pseudopodia for locomotion
Example:Amoeba
• Sporozoans - Parasites
Example:Plasmodium