Cell Theory

• Cell


  Basic building blocks of all living things
• Robert Hooke discovered tiny chambers in cork cells, which he called "cells" or "cellulae" in 1665
• Anton Van Leeuwenhook discovered tiny living organisms and named them Animalcules in 1676

  Observed cells clearly because of his microscope with improved lenses (270 to 300-fold)
• Robert Brown discovered the nucleus in 1831
• Matthias Schleiden discovered cells in plants in 1838
• Theodor Schwann - Concluded that cells are the basic building blocks of all living things; Animal tissues are composed of cells in 1839
• Rudolf Virchow concluded that all cells come from pre-existing cells or "omnis cellula e cellula" in 1858
• What did Rudolf Virchow contribute/his theory?

  omnis cellula e cellula
• Classic Cell Theory

  1. All living things are composed of one or more cells
  2. Cell is the basic unit of life
  3. All cells come from pre-existing cells