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In biology, the cell is the basic structure of organisms. All cells are made by other cells.
The environment outside the cell is separated from the inside of the cell by thecell membrane. Inside some cells, parts of the cell stay separate from other parts by plasma membranes. These separate parts are called organelles (like small organs). They each do different things in the cell. Examples are thenucleus (where DNA is), and mitochondria (where usable energy is created).
Kinds of cells انواع الخلايا
There are two basic kinds of cells: prokaryotic cells and eukaryotic cells. Prokaryotes, bacteria and archaea, are simple cells that have no cell nucleus. They do have bacterial microcompartments.
Eukaryotes are complex cells with many organelles and other structures in the cell. They are larger than prokaryote cells: they can be as much as 1000 times greater in volume. Eukaryotes store their geneticinformation (DNA) on chromosomes in the cell nucleus. Organisms (living things) which are made up of multiple cells are eukaryotes.
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