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The Cell Theory – a timeline • Late 1500’s: • Early 1600’s: -first lenses used in Europe -used to determine cloth quality (weave and precision) -combos of lenses gave better view Leeuwenhoek uses microscope to study nature (c) Copyright - All rights reserved www.cpalms.org Early 1600’s Early 1600’s (c) Copyright - All rights reserved www.cpalms.org • Leeuwenhoek • first to view pond water organisms • First to see living microscopic organisms • Made careful sketches Robert Hooke ( 1665) • Used light a microscope to look at thin slices of plant tissues -- cork • Looked empty, like a monk’s chamber • Called tiny chambers “cells” (c) Copyright - All rights reserved www.cpalms.org Matthias Schleiden 1838 • German Botanist (plants) • All plants looked at were made of cells, so concluded: “All plants are made of cells.” (c) Copyright - All rights reserved www.cpalms.org Theodore Schwann -- 1839 • German scientist who studied animals -- zoologist • Saw that all animals he studied were cellular so concluded: “All animals are made of cells.” (c) Copyright - All rights reserved www.cpalms.org Rudolf Virchow -- 1855 • German physician who studied cell reproduction • “Where a cell exists, there must have been a preexisting cell…..” (c) Copyright - All rights reserved www.cpalms.org The Cell Theory • All living things are composed of cells • Cells are the basic units of structure and function in living things • New cells are produced from existing cells (c) Copyright - All rights reserved www.cpalms.org Organelles do not work alone… • Cell is a dynamic interaction of ALL of its parts – literally, the basic unit of life…. (c) Copyright - All rights reserved www.cpalms.org All images are public domain