Protozoa - Wikipedia
WEBProtozoa (sg.: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. [1][2] Historically, protozoans were regarded as "one-celled animals".
Protozoan | Definition, Parasites, Diseases, Characteristics, Size ...
WEBprotozoan, organism, usually single-celled and heterotrophic (using organic carbon as a source of energy), belonging to any of the major lineages of protists and, like most protists, typically microscopic. All protozoans are eukaryotes and therefore possess a “true,” or membrane-bound, nucleus.
Protozoa - Definition, Examples, Characteristics, and Classification
WEBAug 3, 2023 · More than 50,000 species are known, most of which are free-living organisms. Some common examples of protozoa are Amoeba proteus, Paramecium caudatum, Euglena gracilis, Plasmodium falciparum, and Trypanosoma brucei.
Protozoa: Structure, Classification, Growth, and Development
WEBStructure. Protozoa are microscopic unicellular eukaryotes that have a relatively complex internal structure and carry out complex metabolic activities. Some protozoa have structures for propulsion or other types of movement.
protozoan - Kids | Britannica Kids | Homework Help
WEBProtozoans are simple organisms, or living things. They belong to a group of organisms called protists, which are neither plants nor animals. Most protozoans are so tiny that they can be seen only with a microscope. Amoebas and paramecia are types of protozoan.
Structure and classification of protozoan | Britannica
WEBprotozoan , Any of a group of small (usually microscopic) single-celled protist s that are nonfilamentous and heterotrophic (using organic carbon as a source of energy). They are found in most soils, fresh water, and oceans. While most are solitary individuals, various colonial forms exist.
Microbiology - Protozoa, Eukaryotes, Unicellular | Britannica
WEBProtozoa, or protozoans, are single-celled, eukaryotic microorganisms. Some protozoa are oval or spherical, others elongated. Still others have different shapes at different stages of the life cycle. Cells can be as small as 1 μm in diameter and as large as 2,000 μm, or 2 mm (visible without magnification).
Protozoa- Definition, Characteristics, Classification, Examples
WEBAug 3, 2023 · Protozoans exhibit mainly two forms of life; free-living (aquatic, freshwater, seawater) and parasitic (ectoparasites or endoparasites). They are also commensal in habitat. They are small, usually microscopic, not visualize without a microscope. They are the simplest and primitive of all animals.
Protozoa and the Illnesses They Cause - Verywell Health
WEBOct 14, 2022 · Protozoa are single-celled organisms that can sometimes cause diseases. Common protozoan diseases include malaria, giardia, and toxoplasmosis. Diagnosing protozoan illness may involve blood tests, stool tests, or biopsies, depending on which protozoa a healthcare provider suspects. Treatment varies based on the cause.
Protozoa - New World Encyclopedia
WEBProtozoa (in Greek proto = first and zoa = animals) is a diverse group of single- celled, microscopic or near-microscopic eukaryotes (organisms whose cells have nuclei) that commonly show characteristics usually associated with animals, most notably mobility and heterotrophy. An organism belonging to this group may be known as a protozoan ...