What types of microorganisms are included in the study of protozoa?

The study of protozoa focuses on single-celled eukaryotic microorganisms, which constitute a diverse group of organisms. Protozoa are characterized by their complex structures, including a nucleus and various organelles, distinguishing them from prokaryotic organisms such as bacteria. These single-celled eukaryotes play significant roles in ecological systems, including acting as predators of bacteria and serving as parasites in various hosts.

Understanding protozoa involves studying their various classes and life cycles, as well as their impact on human health, ecosystems, and environments. They can be found in diverse habitats, ranging from freshwater and marine environments to soil and even as part of the microbiota in higher organisms. Thus, recognizing protozoa as single-celled eukaryotes is essential for understanding their biology, pathogenic potential, and ecological significance.