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Today’s ObjectiveGiven information about the
development of cell theory, summarize the contributions of scientists and/or state the cell theory.
Muhammad Asif
Cell theory
Presented by:
Muhammad Asif
Muhammad Asif
Early Scientists
Muhammad Asif
Anton van Leeuwenhoek
First compound light microscope
Muhammad Asif
Robert HookeCoined the term “cell”
Muhammad Asif
Matthias Schlieden
All plants are made of cells
Muhammad Asif
Theodor SchwannAll animals are made of
cells
Muhammad Asif
Rudolf VirchowCells can only arise from pre-existing cells
Muhammad Asif
Cell Theory1. The cell is the basic unit of
structure.2. The cell is the basic unit of
function.3. All cells arise from pre-
existing cells.Muhammad Asif
Spontaneous Generation?
Francesco Redi
Muhammad Asif
Muhammad Asif
Germ Theory of Disease
Microscopic organisms cause diseases.
Pasteur
Muhammad Asif
Muhammad Asif
Why do we care today?
Muhammad Asif
Muhammad Asif