4. The Inner Life of the Cell
This video is a high quality visualization of
life inside of a single-white blood cell.
5. History of Cells: First Sighting
In 1665, Robert Hooke
used a microscope to
examine a thin slice of
cork
What he saw looked like
small boxes
Hooke called them
“CELLS” because they
looked like small rooms
7. History of Cells: First Living Cells
In 1673, AntonVon
Leeuwenhoek (a Dutch
microscope maker), was
first to view living cells
Leeuwenhoek used a
simple, handheld
microscope to view tiny
creatures in pond water
& scrapings from his
teeth
9. History of Cells: Plants & Animals
In 1838, a German botanist
named Matthias Schleiden
concluded that all plants
were made of cells
In 1839, a German zoologist
namedTheodore Schwann
concluded that all animals
were made of cells
11. History of Cells: Cell Division
In 1855, a German medical
doctor named Rudolph
Virchow used a microscope
to observe cells dividing
He reasoned that all cells
must come from other pre-
existing cells by cell division
13. CellTheory
The CellTheory summarized all scientific knowledge
about cells into 3 statements.
1) All living things are made of cells.
2) New cells are created by old cells dividing into two.
3) Cells are the basic building units of life.
14. Unicellular & Multicellular Life
Unicellular Life – Composed
of one cell. These are small
things like bacteria.
Multicellular Life- Composed
of many cells. All plants &
animals are multicellular.
15. Cell Specialization
In multicellular organisms, cells
within the body are designed for
different jobs.
Cells begin as an unspecialized
type called Stem Cells
These stem cells can transform
into more specialized types
when they are exposed to
chemical signals
