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Development of the Cell Theory
Robert Hooke

(1665)
 …looked
at cork
 …saw tiny room-like structures
 ...named them “cells” tiny rooms
Anton von Leeuwenhoek
 (1670-80’s)
 …looked
at blood, pond water, rain
water, skin
 …saw tiny organisms…named them
animalcules (protists/bacteria)
Matthias Schleiden
 (1838)
 …looked
at plants
 …determined they are made of cells
Theodore Schwann
 (1834)
 …looked
at animals
 …determined they are made of cells
FirstTwo Parts of the Cell Theory…
(1) All living things are made of cells
(2) A Cell is the basic unit of
structure and function in living
things
Rudolf Virchow
 (1858)...
 Continued
to study and observe cells
 Worked mainly with where cells
come from
Third Part of Cell Theory
(3) Cells come from other cells
CELL THEORY
(1) All
living things are made of cells
(2) The cell is the basic unit of
structure and function in living
things…smallest working unit in
living things
(3) Cells come from other cells
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