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Year 8, unit 3 Cells Name: .......................................................................... Class: .......................... Date: ...................... Lesson 1: Cell theory Worksheet: History of cells timeline Cut out the information below and place it on a timeline in your book. 1841 Robert Remak saw the biscuit-shaped blood corpuscles of a chicken. 1842 John Goodsir described the nucleus of a cell as the reproductive organ of a cell. 1674 Anton van Leeuwenhoek described small moving ‘animacules’ in algae. 1976 Gordon H. Sato and colleagues showed that different types of cells require different nutrients. 1858 Professor Rudolf Virchow stated that ‘every cell originates from another existing cell like it’. 1840 Martin Barry described the fertilised egg cell dividing into 2 cells, then 4, then 8 etc. 1843 Martin Barry described a sperm and an egg cell of a rabbit. Early 1600s Zacharias 1939 The first electron Jansen made the first microscope was sold. compound microscope. 1951 George Otto Gey grew cervical cells from cervical cancer cells taken from Henrietta Lacks. HeLa cells are still sometimes used today. 1809 Charles-François Brisseau de Mirbel described vegetables as being made up of cells that shared extremely thin walls. 1811 Ludolph Christian Treviranus and Johann Jacob Moldenhawer proposed that cells are separate units. 1824 Henri Dutrochet declared, ‘The cell is the fundamental element of organisation’. 1833 Robert Brown described the nucleus in the cells of an orchid. 1839 Theodor Schwann described the nucleus in both plant and animal cells. 1665 Robert Hooke examined very thin slices of cork under a compound microscope and saw many tiny compartments that reminded him of the cells monks lived in. He called them ‘cells’. He was actually seeing cell walls. © 2013 Education Services Australia Ltd, except where indicated otherwise. You may copy, distribute and adapt this material free of charge for non-commercial educational purposes, provided you retain all copyright notices and acknowledgements. 1