
Protozoa - Wikipedia
Meiotic sex is widespread among eukaryotes, and must have originated early in their evolution, as it has been found in many protozoan lineages that diverged early in eukaryotic evolution.
Protozoan | Definition, Parasites, Diseases, Characteristics, Size ...
Dec 17, 2025 · Protozoan, 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 …
Protozoa and the Illnesses They Cause - Verywell Health
Oct 19, 2025 · Protozoa are tiny, single-celled organisms that can cause diseases like malaria, giardia, and toxoplasmosis. Protozoan infections can be identified through blood, stool tests, …
What Are Protozoan Parasites and the Diseases They Cause?
Jul 30, 2025 · What are Protozoan Parasites? Protozoan parasites are distinct from bacteria and viruses because they possess a complex internal structure typical of eukaryotic cells, including …
What are Protozoa? - Microbiology Society
Protozoa are micro-organisms which have a membrane bound nucleus that can't be categorised as a fungi, animal or plant. Most protozoa are free living, but some are parasitic. They are …
Protozoan Parasites: Major Human Pathogens and Their Diseases
Sep 6, 2025 · Learn about protozoan parasites: types, life cycles, diseases (amoebiasis, giardiasis, malaria), diagnosis, prevention, and nursing care.
Protozoa - Definition, Classification, Characteristics, Structure ...
Oct 1, 2024 · Protozoa, comprising approximately 50,000 known species, are among the simplest and most primitive of all eukaryotic organisms. They exhibit diverse forms of life, primarily …
9: Protozoa - Biology LibreTexts
Protozoa are unicellular eukaryotic microorganisms lacking a cell wall and belonging to the Kingdom Protista. The vegetative, reproducing, feeding form of a protozoan is called a …
Protozoa - Definition, Examples, Characteristics, and Classification
Aug 3, 2023 · Some common examples of protozoa are Amoeba proteus, Paramecium caudatum, Euglena gracilis, Plasmodium falciparum, and Trypanosoma brucei. The modern classification …
PROTOZOAN Definition & Meaning - Merriam-Webster
The meaning of PROTOZOAN is any of a phylum or subkingdom (Protozoa) of chiefly motile and heterotrophic unicellular protists (such as amoebas, trypanosomes, sporozoans, and …