Discovering Cells.

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Students Will: summarize the contributions scientists have made toward the cell theory state the cell theory.

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Presentation transcript:

Discovering Cells

All Living Things Are Made of Cells. Cells are the basic unit of structure and function in living things

A microscope is an instrument that makes small objects look larger Cells Are Discovered The invention of the microscope led to the discovery of cells. (Hans Jensen made one of the first microscopes,1590) A microscope is an instrument that makes small objects look larger Simple microscope has one lens Compound microscope has more than one

Robert Hooke (1663) One of the first people to observe cells Used a compound microscope he had built. Observed cork Cells looked like small rectangular rooms called them “cells” One inch about 12 hundred million

Anton van Leeuwenhoek (1683) Made his own lenses Used simple microscopes Observed pond water, named creatures animalcules Observed teeth scrapings, first to see bacteria

Cell Theory Many scientists discoveries contributed. Matthais Scheiden (1838) – plants composed of cells Theodor Schwann (1839) – animals composed of cells Rudolf Virchow (1855) – all cells come from existing cells

Cell Theory states All living things are composed of cells Cells are the basic unit of structure and function in living things All cells are produced from other cells