Amoeba making phagocytosis

What is it - biological definition

The amoeba is a unicellular animal, that is, it is composed of only a single cell. Due to its size, on average 0.2 millimeters, it can only be observed with the help of a microscope. It is classified as protozoan and its life dates back to the period of origin of our planet.

Main features of amoebas

Amoebas live in the aquatic environment (lakes, puddles, streams), terrestrial and even in the organism of other living beings such as man. In the latter case it can cause dangerous diseases such as amoebiasis. Most diseases caused by amoebas are caused by ingestion of contaminated water or prepared foods without proper hygiene conditions.

The amoeba's body has no definite shape, and the body is almost entirely made up of a gelatinous substance (protoplasm). Inside the protoplasm we can find the nucleus.


The amoeba feeds on a system called phagocytosis. It uses pseudopods (false feet) to wrap the food. These pseudopods close and the food is digested in a pouch inside the amoeba.

Cyst Transformation

Another interesting feature that amoebas use is transformation into cysts. When the environment she lives in is unfavorable (dry place or without food), she becomes a cyst. In this form you can live a long time. When it is in liquid medium, again this cyst breaks and the amoeba appears again.

Biological curiosity:

"It is through pseudopods that amoebas can move around."