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, a simple cell]] Cell theory is a Scientific Theory that is one of the foundations of Biology . MODERN CELL THEORY The generally accepted parts of cell theory include: # The Cell is the fundamental unit of structure and function in living things. # All cells come from pre-existing cells by division. # Energy Flow ( Metabolism and Biochemistry ) occurs within cells. # Cells contain hereditary information which is passed from cell to cell during cell division # All cells are basically the same in chemical composition. # All known living things are made up of cells. # Some organisms are unicellular, made up of only one cell. # Others are multicellular, composed of countless number of cells. This theory also contains two exceptions: # Virus es are considered by some to be alive, yet they are not made up of cells. # The first cell did not originate from a preexisting cell. Nuclear Pore HISTORY OF CELL THEORY The cell was first discovered and named by Robert Hooke in 1663. He remarked that it looked strangely similar to ''cellula'' or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead cell walls of plant cells also known as Cork . These cell walls lacked the Nucleus and other Organelle s found in most living cells. The first man to witness a live cell under a microscope was Anton Van Leeuwenhoek , who in 1674 described the Algae '' Spirogyra ''. Van Leeuwenhoek also described bacteria which he referred to as animacules.
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