Cell Structure and function
THIS
NOT THIS
7-1 Life is Cellular
The observations and conclusions of many scientists
helped to develop the current understanding of the cell
• Robert Hooke (1665)
– Used primitive
compound microscope
to look at plant tissue
(cork).
– He called the chambers
“cells” because they
reminded him of the
small rooms in a
monastery
• Anton van Leeuwenhoek (1674)
– First person to see tiny living
organisms in a drinking water.
(Also observed bacteria in a
human mouth)
– What new information was
learned through
Leeuwenhoek’s observations?
• Matthias Schleiden (1838)
– Concluded that all plants are
made of cells
• Theodore Schwann (1839)
– Concluded that all animals are
made up of cells
• Rudolph Virchow (1855)
– Proposed that all cells come from
existing cells
– What question does this finding
leave unanswered?