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LESSON 1: PROPONENTS OF CELL THEORY Robert Hooke-microbiologist in 1600s He wrote a very famous book called Micrographia which contained detailed drawings of small as a flee. He 1 viewed the cells under the microscope in 1665. He called these room-like structures in cork cell. He was the first t...

LESSON 1: PROPONENTS OF CELL THEORY Robert Hooke-microbiologist in 1600s He wrote a very famous book called Micrographia which contained detailed drawings of small as a flee. He 1 viewed the cells under the microscope in 1665. He called these room-like structures in cork cell. He was the first to use the term cell to refer to tiny structures. ANTONIE VAN LEEUWENHOEK-linen merchant in the town of Delft. He created his own viewing machine. He discovered bacteria and called it animalcules. He was the first man to view human sperm cell. THEODOR SWANN-animal biologist.. During his research, he kept finding the same global structure, red blood cells. MATTHIAS J. SCHLEIDEN-a plant biologist. He spoke passionately with Schwann about his research and how the cells made up and in return schwann revealed his work on the nerves of the edible frog and they figured out that they are both made of the same material-cells. ROBERT REMAK-first one to witness cell division. He discovered that RBC have been splitting into two Remak changed his approach and he used egg frogs for his experiments. RUDOLF VIRCHOW-he took all the credits of Remak's research. He created his own phrase "all cells from other cells" THE CELL THEORY 1. All living organisms are composed of one or two cells-one cell are called unicellular or single celled organisms. Ex. Bacteria and protozoans. More than one cell is called multi-cellular or multi-celled organisms. 2. A cell is the basic unit of life -the cell is a completely functional entity. Biological processes cannot occur without the presence of cells. Cells are the building blocks of every system in living things. 3. All cells came from preexisting cells-cells cannot be spontaneously created but a product of reproduction of for preexisting cells. This postulate of theory refers to cell division. Cell division can be different types like fission or budding in yeast cells, mitosis and meiosis in plant and animal cells, and human cells. 4. Energy flow occurs within cells chemical energy is produced from thousands of biochemical reactions that take place inside the cell. 5. Hereditary information or DNA is passed on from one cell to another-the process results in the parent cell passing on its genetic content or DNA to the offspring. THE MODERN CELL THEORY Chromosomes that contain genetic material is passed on from parents cells to daughter Cells. 6. All cells have the same basic composition -- Almost all cells are surrounded by a cel wall an filled with a fluid like substance known as cytoplasm or cytosol in which organelles ae Present.