1. Discovering Cells 3.1

2. I. Cells are the basic units of structure and function in living things.

3. A. Cell structure describes what cells are made of and how cell parts are put together.

4. B. Cell Functions include taking in food and O2, getting rid of waste and growing.

5. C. Cell size is measured in micrometers.
1 millionth of a meter.
1 RBC = 7 micrometers

6. The first observations of cells was possible due to the invention of the microscope in 1590.

7. Robert Hooke
observed cork cells
in 1663 and called
them cells since
they looked like
“small rooms.”

8. Examine the time line on
pages with
the different types
of microscopes
developed since 1590.

9. B. Anton van Leeuwenhoek observed
small organisms
moving in lake
water.
He called them
“animalcules.”
1674

10. C. Schleiden stated all plants are made of cells. (1838)
Schwann stated animals are
made of cells. (1839)
Virchow stated that all
new cells come from cells
that already exist.
(1855)

11. D. The Cell Theory states:
All living things are composed of cells.
Cells are the basic units of structure and function in living things.
All cells are produced from other cells.

12. III. Unicellular:
Composed of
one cell
ie. bacteria

13. CTOOSOO IV. Multicellular: composed of many cells. Cells can be
organized
into tissues,
organs,
and organ systems.

14. The End…