Cell theory: The cell theory

The cell theory, a foundational tenet in biology, posits that all living organisms are composed of fundamental units known as cells . These cells, irrespective of their size or complexity, form the structural and functional basis of life. Learn about the scientific theory that living organisms are made of cells, the basic unit of structure and reproduction. Explore the history of cell discovery, from Robert Hooke's observation of cork pores to Anton van Leeuwenhoek's study of microorganisms. Cell Theory is a foundational biological principle stating that all living organisms are composed of cells, the cell is the basic unit of life, and all cells arise from pre-existing cells. What is Cell Theory ? Cell theory is a fundamental principle of biology that states all living organisms are composed of cells, the cell is the basic unit of life, and all cells arise from pre-existing cells. This theory highlights the importance of cells in the structure, function, and growth of all living things. It integrates concepts of biology from the microscopic to the macroscopic level, providing a unified understanding of life processes. First articulated in the mid-19th century ...