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Robert Hooke created a compound microscope
Hooke built a compound microscope with screw-operated focusing structure he designed. (Before his invention,people needed to move the specimen to get it in focus.) Hooke used the compound microsope to look at the small details of the natural world. Hooke went on to discover microscopic fungi and plant cells. He later described his discoveries in his book Micrographia. This invention of the compund microscope by Robert Hooke revealed a worl people had no idea about. -
Robert Hooke discovered the cell
While looking at a slice of cork, Robert Hooke saw small "compartmets" and called them cells. He did not kow the structure orfunction of the cell and there was no indication of a nucleus or organelles. Hooke's dicorvery proved that evrything is made up small compartments caled cells. -
Antonie Von Leeuwenhoek created a microscopic lens
During Leeuwenkoek's visit to England in 1668 he most likely saw a copy of Robert hokke's book Micrographia, which had a description of how to make a microscopic lens. It is believed that Leeuwenhoek used Hooke's description to make single-lens microscopes, although Leeuwenhoek kept details of how he made the microscopes a secret. Leeuwenhoek's microscope could magnify between 200 and 300x. -
Antonie Von Leeuwenhoek discovered single-celled life and the size and shape of red blood cells
Leeuwenhoek discovered single-celled plants and animlas-protists by using his microscopic lens. Leeuwenhoek's discovery was rejected until Hooke returned to studying the orgainsim with the microscope and verified Leeuwenhoek's discovery. While lookiing at red blood cells (discovered by Jan Swammerdam) Leeuwenhoek was able to accurately draw the size and shape of red blood cells. These discoveries proved that everything is infact orgainized and has a specific structure. -
Leeuwenhoek discovered bateria
While examining wtaer, Leeuwenhoek discovered bacteria. Leeuwenhoek then went on to estimate it would take more than 10,000 bacterias to fill a small rain of sand. This discovery proved living things can be found in water. (Leeuwenhoek then went on to discover, in1677,that eggs are fertilized when sperm enters them.) -
Henri Dutrochet discovers Osmosis and diffusion
Dutrochet observed that certain organic membranes allow the passage of water but stop the molecules dissolved in it so between two solutions of different concentration water passes from the less concentrated to the more concentrated, even against gravity. He wanted to show the unity of basic processes in ALL living things. His experimenal studies led him to believe there us only one general science of the fuction of living bodies, Dutrochet is considered to be the founder of the cell theory. -
Felix Dujardin discovered Phizopoda (Protozoans)
While studying in the Mediterranean, Dujardin proposed many living organisms are made up of single cells; Dujardin also observed the presence of internal strucures in all of the cells and that the substances were similar in each cell. He then went on to propose a group of single-celled animals called Rhizopoda. His discoveries helped him argue that against microscopic organisms having the same organs as higher animals. -
Theodor Schwann discovered how the cell theory related to animals.
Schwann defined the cell as the basic unit of animal structure.While following Scleidens's research on plants, Schwann verified the existence of cells and traced the development of many adult tissues from early embryo stages. With Matthias Schleiden Schwann created the cell theory. -
Theodor Schwann proposed generalizations concerning the nature of cells
His first generalization was that animals and plants consist of cells plus the function of cells. Another generalization was that the cells have independent lives, which are controlled by the organism's life. Schwann also categorized cells as plastic phenomena- the combination of molecules to form a cell- or metabolic phenomena-cells that come from chemical changes in the component particles of the cell or in the cytoplasm. He also created the word metabolism. Schwann cofounded the cell theory -
Matthias Schleiden
Schleiden stated that the different parts of the plant organism are composed of cells or components of cells, and recognized the cell as the primary unit of all living. He also recognized the importance of the cell nucleus and sensed its connection with cell division. Schleiden cofounded the cell theory with Theordor Schwann. -
Rudolph Virchow
Virchow is know for the term "omnis cellula e cellula"-"every cell is derived from a [preexisting] cell”. The theory that cells came from other cells originally came form Robert Remak, but Virchow took it as his own work. The theory that cells come from other cells disproved the theory that cells could come from nonliving matter. Virchow's famous quote adds on to Francesco Redi's quote "Omne vivum ex ovov"-"every living thing comes from a living thing" by extending it to cells come from cells.