The study of cells, their physiological properties, structure, environmental interaction, division, life cycle, and death, as well as the organelles they contain. Also known as cytology.
The cell is the basic functional unit of all known life forms, and is the smallest unit which can replicate independently. Cells are a cytoplasm contained within a membrane, and can contain a variety of molecules, structures, and organelles, and perform a variety of functions. Cell biology is a broad field so relevant complementary tags should also be considered.