CELL THEORY

MAJOR PRINCIPLES OF THE CELL THEORY

• All organisms are made of cells.
• All existing cells are produced by other living cells.
• The cell is the most basic unit of life.

CONTRIBUTORS TO THE CELL THEORY

• Hooke: The first to identify cells, he named them.
• Leeuwenhoek: Made better lenses and was able to observe cells in greater detail.
• Schleden: The first to note that plants are made of cells.
• Schwan: Concluded that all living things are made of cells.
• Virchow: Proposed that all cells come from other cells.

PROKARYOTIC CELLS

• Do not have a nucleus or other membrane-bound organelles.
• The cells DNA is suspended in the cytoplasm.
• Microscopic single-celled organisms,

EUKARYOTIC CELLS

• Have a nucleus us and other membrane-bound organelles
• The nucleus, the largest organelle, encloses the genetic information,
• Maybe a multi-cellular or single-cellular organisms.