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Robert Brown 1700-1800 (English)

Robert Brown 1700-1800 (English). Noted that cells of plant epidermis, pollen grains, and stigmas contained certain round distinct structures called nuclei Brownian motion. Johannes Purkinje 1700-1800 (Czech). Coined the term “protoplasm” to describe the contents of the cell

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Robert Brown 1700-1800 (English)

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  1. Robert Brown 1700-1800 (English) • Noted that cells of plant epidermis, pollen grains, and stigmas contained certain round distinct structures called nuclei • Brownian motion

  2. Johannes Purkinje 1700-1800 (Czech) • Coined the term “protoplasm” to describe the contents of the cell • Nucleus in bird’s egg, sweat glands in the skin, nerve cells (Purkinje cells), muscle fibers (Purkinje fibers) • Use of fingerprints • Describe the movement of cilia • Use of microtome

  3. Matthias Schleiden 1800 (Deutsch/ Botanist) • “Cell is the basic unit of plants” • Each cell leads a double life, one independent/ own development and integral part of a plant • Described nucleolus

  4. Theodor Schwann 1800 (Deutsch/ Zoologist) • “Cells are organisms and entire plants and animals are aggregates of these organisms arranged according to definite laws” • Living things are composed of cells and their products • Introduced the term metabolism

  5. Rudolf Virchow 1800 (Deutsch/Pathologist) • Omnis cellula e cellula (All cells arise from pre-existing cells) • A contemporary and colleague of Jose Rizal

  6. Louis Pasteur 1800 (French) • Finally disproved spontaneous generation • “Everything in this world depends on work” • Stereochemistry • Germ Theory of Disease • Pasteurization • Vaccination

  7. CELL Theory: All organisms are composed of cells which arise only from pre-existing cells • Modern Statements of the Cell Theory • The cell is the fundamental unit of both structure and functions in all living things. • All forms of life (animal, plant, and microbial) are composed of cells and their secretions. • Cells arise from pre-existing cells. • Each cell has a life of its own in addition to its integrated role in multicellular organisms.

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