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First Microscope
Jansen invented the first basic microscope. Without this invention, people would have never seen cells -
First to understand that there are gases distinct in kind from atmospheric air.
Jan Baptist is regarded as the founder of pneumatic chemistry,[3] as he was the first to understand that there are gases distinct in kind from atmospheric air. The very word "gas" he claimed as his own invention, and he perceived that his "gas sylvestre" (carbon dioxide) given off by burning charcoal, was the same as that produced by fermenting must, which sometimes renders the air of caves unbreathable. For Van Helmont, air and water were the two primitive elements. Fire he explicitly denied to -
Robert Hooke - First cells
In 1665 Hooke published Micrographia, a book describing his microscopic and telescopic observations, and some original work in biology. Hooke coined the term cell for describing biological organisms, the term being suggested by the resemblance of plant cells to monks' cells. -
1st to observe bacteria and protozoa
Anton van Leeuwenhoek - Dutch microscopist who was the first to observe bacteria and protozoa. As a hobby, Leeuwenhoek began grinding lenses and using them to study minute objects, particularly small organisms. -
New system of animal classification
Lorenz Oken came up with a new system of animal classification that demonstrated the path of evolution including: Dermatozoa- invertabrates Glossozoa- fish with the first toungues Rhinozoa- reptiles inwhich the nose opens into the mouth and us used for respiration Otozoa- birds with the first externally open ears Ophthalmozoa- mammals including all sensory organs -
Reconization of Nucleus
Robert Brown The first to recognize the nucleus (a term that he introduced) as an essential constituent of living cells (1831). Brown recognized the general occurrence of the nucleus in these cells and apparently thought of the organization of the plant in terms of cellular constituents. *citation -
Contribution to cell theory
Theodor Schwann Contributed the development of cell theory, the discovery of Schwann cells in the peripheral nervous system, the discovery and study of pepsin, the discovery of the organic nature of yeast, and the invention of the term metabolism. He also stated that "All living things are composed of cells and cell products." And he proved the cellular origin and development of the most highly differentiated tissues including nails, feathers, and tooth enamel -
Reconized importance of Nucleus
Schleiden preferred to study plant structure under the microscope. While a professor of botany at the University of Jena, he wrote Contributions to Phytogenesis (1838), in which he stated that the different parts of the plant organism are composed of cells. Thus, Schleiden and Theodor Schwann became the first to formulate what was then an informal belief as a principle of biology equal in importance to the atomic theory of chemistry. He also recognized the importance of the cell nucleus. -
First to recognize leukemia cells.
Rudolf Virchow Most widely known scientific contribution is his cell theory, which built on the work of Theodor Schwann. He is cited as the first to recognize leukemia cells. He was one of the first to accept and plagiarize the work of Robert Remak who showed that the origins of cells was the division of preexisting cells. -
New microscope technique
Albrecht von Roelliker zology and new first to use and form new microscope technique -
Prevent milk and wine from making people sick
Pasteur came up with a process to prevent milk and wine from making people sick (Pasteurization) which was based off his work in germ theory. He had proven spontaneous generation false and replaced it biogenesis which states that all living things came from preexisting life. Biogenesis is the basis or Germ Theory which, though not originally his idea, led Pasteur to discover vaccines for Rabies and Anthrax as well as other medical accomplishments. -
Human and Animal compared
Aristotle compared the human body and an animals body
