CELL DISCOVERY TIMELINE (1)

• Cell  

  1. From Latin word "CELLA" meaning small room.
  2. A basic unit of living matter separated from its  environment by a plasma membrane.
  3. The fundamental structural unit of life.
  4. The organism's basic unit of structure and function. 
  5. The building blocks of life.
• Zacharias Janssen (1590s)

  Dutch eyeglass maker, invented the very first microscope. 
• Robert Hooke (1665)

  1. While looking at a piece of cork under the microscope, Hooke saw box-shaped structures that he called cell.
  2. English scientist
  3. Sliced a very thin slice of cork from an oak cork and observed it under his own microscope.
  4. He saw minute partitions, room-like structures.
  5. Discovered the minute hollow compartments known as CELL. 
  6. Initially discovered CELL in 1665. 
  7. Hooke devised the compound microscope and illumination system.

  Hooke's law, law of elasticity discovered in 1660.
• Anton van Leeuwenhoek (1674)

  1. While looking at pond water under the microscope, observed what he called "animalcules".
  2. Dutch naturalist.
  3. Universally acknowledged as the father of microbiology.
  4. Expert in grinding lenses and the one who discovered the tiny living organisms which he called "animalcules" from the drop of rain water.
  5. Most of the "animalcules" are now referred to as unicellular organisms.

  He was also the first to document microscopic observations of muscle fibers, bacteria, spermatozoa, red blood cells, crystals in gouty tophi, and blood flow in capillaries.
• ROBERT BROWN

  1. Scottish botanist and palaeobotanist.

  His contributions include one of the earliest detailed descriptions of the cell nucleus and cytoplasmic streaming;

  He discovered the center part of the cell which is the nucleus.

  • Brownian motion - the continuous motion of minute particles in solution.
• Felix Dujardin

  1. French biologist  
  2. Discovered a semi-transparent living substance known as Sarcode, in which later on was changed in protoplasm, the colorless materials comprising the living part of the cell.
• Matthias Jakob Schleiden (1838)

  1. German a botanist, stated that plants are made up of cells.
  2.  He proposed on his studies about the entire parts of the plant and concluded that all plants are made out of cell.
• Theodor Schwann (1839)

  1. a German physiologist, concluded that animals are also made up of cells.
  2. Zoologist, physician and physiologist.  
  3.  His most significant contribution to biology is considered to be the extension of cell theory to animals.
• Rudolf Ludwig Carl Virchow (1855)

  1. stated that cells come from pre-existing cells through cell division.
  2. Known as the "Father of Modern Pathology" and as the founder of social medicine.