Theodor Schwann was a German physiologist and anatomist who is best known for his discovery of the cell. In 1839, Schwann proposed that all living things are composed of cells. He also discovered that fermentation is caused by microorganisms.
Schwann’s work laid the foundation for the cell theory, which states that all living things are composed of cells. Cells are the basic unit of structure and function in living organisms. All cells arise from pre-existing cells, which means that all life is related to a single common ancestor. Cells are the basic unit of life; they are both alive and autonomous, meaning they can function independently or as part of a larger system. The cell theory is one of the most important theories in biology because it explains how living things work at their most basic level—how they grow and divide, how they respond to changes in their environment, and how they interact with other organisms within their ecosystem (or community).
