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protozoa : any of a phylum or subkingdom (Protozoa) of chiefly motile and heterotrophic unicellular protists (such as amoebas, trypanosomes, sporozoans, and paramecia) that are represented in almost every kind of habitat and include some pathogenic parasites of humans and domestic animals — Merriam-Webster   See also   OneLook


Protozoa (singular: protozoan or protozoon; alternative plural: protozoans) are a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris. Historically, protozoans were regarded as “one-celled animals”, because they often possess animal-like behaviors, such as motility and predation, and lack a cell wall, as found in plants and many algae. — Wikipedia

Protozoan (Encyclopædia Britannica)
Protozoa (Biology Online)

Protozoa (Catalogue of Life)
Protozoans (WolframAlpha)



Articles about Protozoa (Big Think)




Microbiology is the scientific study of microorganisms, those being unicellular (single cell), multicellular (cell colony), or acellular (lacking cells). Microbiology encompasses numerous sub-disciplines including virology, bacteriology, protistology, mycology, immunology, and parasitology. Eukaryotic microorganisms possess membrane-bound organelles and include fungi and protists, whereas prokaryotic organisms—all of which are microorganisms—are conventionally classified as lacking membrane-bound organelles and include Bacteria and Archaea. Microbiologists traditionally relied on culture, staining, and microscopy. However, less than 1% of the microorganisms present in common environments can be cultured in isolation using current means. Microbiologists often rely on molecular biology tools such as DNA sequence based identification, for example the 16S rRNA gene sequence used for bacteria identification. — Wikipedia




DDC: 579.4 Protozoa (Library Thing)
Subject: Protozoa (Library Thing)

Subject: Protozoa (Open Library)

LCC: QL 366 Protozoa (UPenn Online Books)
Subject: Protozoa (UPenn Online Books)

LCC: QL 366 Protozoa (Library of Congress)
Subject: Protozoa (Library of Congress)

Subject: Protozoa (WorldCat)




Protozoa I (Biology4Kids)
Protozoa II (Biology4Kids)

Microbial Life Educational Resources (Science Education Resource Center, Carleton College)
In the Classroom (American Society for Microbiology)
Journal of Microbiology & Biology Education (American Society for Microbiology)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources



Microbiologists (US Occupational Outlook Handbook)


Microbiology Society
American Society for Microbiology


Protozoa (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Protozoa (JSTOR)
Protozoa (Science Daily)
Protozoa (Science News)
Protozoa (
Protozoa (NPR Archives)



Protozoa (


Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.