Cell Theory
The 5 main Contributors to Cell Theory:
1. Hooke (1665) was the first
to identify cells, and he named
them.
2. Leeuwenhoek (1674) made
changes to lenses and as a
result observed cells in
greater detail.
The 5 main Contributors to Cell Theory:
3. Schleiden (1838) was the
first to note that plants are
made of cells.
4. Schwann (1839) worked
closely with Schleiden. Having
heard of Schleiden's
discovery about plants,
Schwann noticed the
similarities between plant and
animal cells. He then
published the first statement
of cell theory, concluding that
all living things are made of
cells
The 5 main Contributors to Cell Theory:
5. Virchow (1855) proposed
that all cells come from other
cells after observing cell
division.
The major principles of Cell
Theory are:
• All organisms are made of cells
• All existing cells are produced
by other living cells
• The cell is the most basic unit
of life
How did improvements in the microscope
help scientists form the cell theory?
Cell Theory led to the realization of how
all living organisms are related. Describe in
your own words, how this statement may be
true.