Organisms unicellular are those living beings, to the contrary of multicellular, are composed of a single cell. The circulation in these organisms is developed by the cytoplasm of the cell which is called cyclosis.
There are several unicellular organisms that require a microscope to be seen. Within those who need the aforementioned apparatus, two groups can be distinguished: prokaryotes and eukaryotes. The former are characterized by not having a nucleus and the latter by having it. Here are some examples of organisms unicellular eukaryotes: Blepharisma Giardia Amoeba R. euleeides R. Amitus
Here are some examples of organisms unicellular prokaryotes:
However, there are also organisms unicellular can be apart from the microscope, only the human eye. These are some of the unicellular organisms of this type: Xenophyophores Nommulite Valonia Ventricosa Acetabularia Caulerpa Gromia sphaerica Thiomargarita namibiensis Epulopiscium fishelnosi
Surely you have not been able to see any of the living beings that you know best. This is because these are multicellular organisms . However, it should be mentioned that most living things are single-celled . In addition to this, multicellular beings start out as unicellular . It should also be noted that funicular bodies are the oldest.