Unicellular

Unicellular - This term is used to describe organisms formed from a single cell. Single-celled organisms include protozoa, most bacteria, and some fungi.

Unicellular organisms have a simple structure, consisting of only one cell. This cell contains all the necessary organelles that ensure the vital functions of the body - the nucleus, cytoplasm, mitochondria and others.

Despite their simple structure, single-celled organisms can perform all the basic functions of a living organism - nutrition, respiration, reproduction, excretion and movement. They usually reproduce by dividing the cell in two.

Single-celled organisms are widespread in nature and play an important role in ecosystems. The study of single-celled organisms helps us understand the basics of life and evolution.

Unicellular organisms (Unicellulares Organismen) are organisms that consist of a single cell and are the main components of most living things on Earth.

Single-celled organisms include many species of protozoa, the best known of which are amoebas and eukaryotic bacteria. These organisms are very small and usually cannot be seen with the naked eye.

One of the main advantages of single-celled organisms is their ease of development and reproduction. They can develop and multiply without the need for complex systems of organs and tissues. This makes them ideal for research in biology and medicine.

However, single-celled organisms also have their disadvantages. They cannot support complex processes such as digestion and respiration, limiting their ability to survive in more challenging environments. In addition, some single-celled organisms can cause disease in humans, for example, when infected with parasitic protozoa.

Despite this, single-celled organisms remain an important part of biodiversity and play an important role in Earth's ecosystems. Studying these organisms allows us to better understand how life works on the planet and how it can be used to benefit humans.

Single-celled organisms are an amazing phenomenon of our nature. They represent a unique example of a simple and at the same time extremely effective organization of life. The cells of a multicellular organism (plant or animal) constitute large systems. Such systems can include thousands of cells, each of which performs its own function. However, the history of life shows that the first organisms on Earth were single-celled. Organisms consisting of one cell are called unicellular because there is no cellular differentiation in their structure, therefore they form a single whole. Today, over 60 thousand species of microorganisms belonging to unicellular organisms are known. Such microorganisms include bacteria, chlorella and chlamydia. They are very small single-celled "organisms" as they are only a few micrometers (µm) in size. Bacteria are a single-celled microorganism in the shape of a ball or rod measuring 1–2 microns. Their movement can occur both with the help of flagella and by simple sliding, when moving substances repel an obstacle. The sizes of single-celled animals range from 0.1 to 30 microns. These microorganisms are found almost everywhere, especially in soil. In nature, there are many types of multicellular organisms and species of single