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When people still thought living things came from nonliving things.
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Zacharias JansenZacharias Jansen invented the first compound microscope.
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Jan Baptist van Helmont contibuted to photosynthesis by proving plants didnt get their food thruogh the soil. Jan Baptist van Helmont
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Robert Hooke was examining plant material when he noticed tiny cork like structures which he named cells. Robert Hooke
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Anton van Leeuwenhoek invented the first practical microscope that allowed him to be the first to see and describe bacteria. Anton van Leeuwenhoek
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Lorenz OkenLorenz Oken stated that all organic beings originate from and consist of vesicles or cells.
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Robert Brown discovered the nucleus inside plant cells. Robert Brown
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Matthias Scheiden discovered the nucleus in plant cells. Matthias Scheiden
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Theodor SchwannTheodor Schwann stated that all living things are composed of cells.
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Albrecht von Roelliker discovered that sperm cells and egg cells are also cells. Albrecht von Roelliker
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Rudolf Virchow observed that a whole organism does not get sick, just somecells or a group of cells. Rudolf Virchow
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Louis Pasteur develpoed the process known as pasteurization which kills bacteria helping food stay fresh longer. Louis Pastuer
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Theory that all living things come from cells.
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Aristotle came up with the theory of spontaneous generation. Aristotle
