gen bio

• Cells


  The fundamental unit of structure and function in all living organisms
• Cell division


  One cell dividing into two cells
• Cell Theory


  • All organisms are made up of one or more cells
  • All the life functions of an organism occur within cells
  • All cells come from preexisting cells
• Theodor Schwann and Matthias Jakob Schleiden suggested that cells were the basic unit of structure and function of all living things


  1839
• Rudolf Virchow observed that cells divide to produce more cells and proposed that all cells arise only from other cells


  1858
• The collective observations of Schwann, Schleiden, and Virchow form the Cell Theory
• Modern Cell Theory


  • All known living things are made up of one or more cells
  • All living cells arise from pre-existing cells by division
  • The cell is the fundamental unit of structure and function in all living organisms