The amoeba is a unicellular microorganism, or consists of only a single cell. One of its main features are the body extensions, called pseudopodia, responsible for moving and getting food. The pseudopodia are formed from a movement of the internal fluid of the cell (endoplasm) what causes a projection within the cell. Its shape is very variable, since its gelatinous body takes different forms in some cases. Some species have a protective shell and due to the presence or absence of it amoebas are subdivided into two groups:

Naked amoebae 


Amoebas with theca