The Cell Theory a timeline

1
The Cell Theory a timeline

• Late 1500s -first lenses used in Europe
• -used to determine cloth quality (weave
  and precision)
• -combos of lenses gave better view
• Early 1600s Leeuwenhoek uses microscope
  to study nature

2
Early 1600s
Early 1600s

• Leeuwenhoek
• first to view pond water organisms
• First to see living microscopic orgs
• Made careful sketches

3
Robert Hooke ( 1665)

• Used light microscope to look at thin slices of
  plant tissues -- cork
• Looked empty, like monks chamber
• Called tiny chambers cells

4
Cork Cell
Robert Hooke came up with the name cell after
observing cork through a microscope
5
Matthias Schleiden 1838

• German Botanist (plants)
• All plants looked at were made of cells, so
  concluded
• All plants are made of cells.

6
Theodore Schwann -- 1839

• German scientist who studied animals -- zoologist
  
• Saw that all animals he studied were cellular so
  concluded
• All animals are made of cells.

7
Rudolf Virchow -- 1855

• German physician who studied cell reproduction
• Where a cell exists, there must have been a
  preexisting cell..

8
The Cell Theory

• All living things are composed of cells
• Cells are the basic units of structure and
  function in living things
• New cells are produced from existing cells

9
Basic Cell Structures

• Cell membrane thin, flexible barrier around
  cell
• Nucleus large, centralized structure that
  contains genetic material and controls cellular
  activities
• Cytoplasm material inside membrane (but not
  inside the nucleus) that supports the internal
  cell shape and organelles