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Zacharias jansen events microscope
Zacharias Jansen events the microscope in 1590. With out his invention we today would not know of cells -
anton van leeuwenhoek
Using handcrafted microscopes, Anton van Leeuwenhoek was the first person to observe and describe single celled organisms, which he originally referred to as animalcules (which we now refer to as microorganisms). He was also the first to record and observe muscle fibres, bacteria, spermatozoa and blood flow in capillaries (small blood vessels). -
robert hooke
English physicist who discovered the law of elasticity, known as Hooke’s law, and who did research in a remarkable variety of fields. -
jan baptist van helmont
Flemish physician, philosopher, mystic, and chemist who recognized the existence of discrete gases and identified -
theodor schwann
After studying medicine in Berlin, Schwann assisted the physiologist Johannes Peter Müller (1834–38). In 1836, while investigating digestive processes, he isolated a substance responsible for digestion in the stomach and named it pepsin, the first enzyme prepared from animal tissue. While professor of physiology at the Catholic University of Leuven (Louvain), Belg. (1839–48), he observed the formation of yeast spores and concluded that the fermentation of sugar and starch was the result of life -
albrecht von roelliker
found the sperm and egg cell -
lorenz oken
German naturalist, the most important of the early 19th-century German “nature philosophers,” who speculated about the significance of life, which they believed to be derived from a vital force that could not be understood totally through scientific means. He elaborated Wolfgang von Goethe’s theory that the vertebrate skull formed gradually from the fusion of vertebrae. Although the theory was later disproved, it helped prepare a receptive atmosphere for Charles Darwin’s theory of evolution. -
robert brown
Scottish botanist best known for his description of the natural continuous motion of minute particles in solution, which came to be called Brownian movement. In addition, he recognized the fundamental distinction between the conifers and their allies (gymnosperms) and the flowering plants (angiosperms), recognized and named the nucleus as a constant constituent of living cells in most plants, and improved the natural classification of plants by establishing and defining new families and genera. -
mattias schleiden
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, discovered in 1831 by the Scottish botanist Robert Brown -
louis pasteur
rench chemist and microbiologist who was one of the most important founders of medical microbiology. Pasteur’s contributions to science, technology, and medicine are nearly without precedent. He pioneered the study of molecular asymmetry; discovered that microorganisms cause fermentation and disease; originated the process of pasteurization; saved the beer, wine, and silk industries in France; and developed vaccines against anthrax and rabies. -
rudolf virchow
German pathologist and statesman, one of the most prominent physicians of the 19th century. He pioneered the modern concept of pathological processes by his application of the cell theory to explain the effects of disease in the organs and tissues of the body. He emphasized that diseases arose, not in organs or tissues in general, but primarily in their individual cells. Moreover, he campaigned vigorously for social reforms and contributed to the development of anthropology as a modern
