THE CELL THEORY

THE THREE PARTS OF THE CELL THEORY

• All organisms are composed of one or more cells.
• The cell is the basic unit of structure in an organism.
• All cells come from preexisting cells.

HOW CELLS WERE DISCOVERED

• Cells were discovered when a
• scientist named Zacharias
• Jensen invented the microscope
• and was constantly looking at
• things under the microscope.

HOW THE CELL GOT ITS NAME

• The cells got its name from
• When Robert Hooke looked at a
• Piece of pork under a microscope
• And saw tiny little chambers or
• Cells in the pork

HOW STEP ONE WAS DISCOVERED

• Step one was discovered when
• two German scientist was constantly
• looking at plants and animal cell under a
• Microscope and eventually realized that
• all plants and animals have cells.

HOW STEP THREE WAS DISCOVERED

• Step three was discovered when the Schwann and Schlieden
• met and Schwann said that cells disperse from other cells
• while Schlieden said that they randomly came out of no
• Where then a third a scientist named Rudolf Virchow came
• In to prove Schwann's theory.

HOW THE SECND STEP WAS DISCOVERED

• The video doesn't say how the second step was
• Discovered but there still is an answer the answer
• Is kind of inside of step one because if all organisms
• Have cells and cells is the basic unit of structure
• In organisms then without cells there would be nothing