The content of cell theory, briefly

Cell theory is a theory that cells are the basic units of the structure and life activities of animals and plants. It was put forward by German biologists Matthias Jakob Schleiden in 1838 and Theodor Shi Wang in 1839 respectively.

2. Specific contents.

① cells are organisms, and all animals and plants are developed from single cells and are composed of cells and cell products (it cannot be described as "all living things are composed of cells and cell products", why not? Because viruses are not made of cells.

② All cells are basically similar in structure and composition;

③ The new cells are derived from the existing cells;

④ biological diseases are caused by abnormal cell function.

⑤ cells are the basic units of organism structure and function.

⑥ organisms reflect their functions through the activities of cells.

⑦ cell is a relatively independent unit, which not only has its own life, but also plays a role in the whole life composed of other cells.

3. significance.

The cell theory explains the unity of cells and organisms, and lays the foundation for Darwin's theory of evolution and the establishment of Marxist scientific socialism.