Cells
https://www.youtube.com/watch?v
=gFuEo2ccTPA&index=3&list=RDzafJKbMPA8 (Intro video)
Cells
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
What is a cell? (Define it)

Basic unit of structure and function

Makes up all living things
What are life’s levels of organization?
(from smallest to largest)
1.
Atoms
2.
Molecules
3.
Organelles
4.
Cells
5.
Tissues
6.
Organs
7.
Organ systems
8.
Organism
Robert Hooke

In 1665 Hooke published Micrographia, a book describing
observations made with microscopes and telescopes, as well as
some original work in biology. Hooke coined the term cell for
describing biological organisms, the term being suggested by the
resemblance of plant cells to monks‘ cells. The hand-crafted,
leather and gold-tooled microscope he used to make the
observations for Micrographia, originally constructed by Christopher
White in London, is on display at the National Museum of Health and
Medicine in Washington, DC.
Robert Hooke

Coined the term “cell”
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Saw the first cells

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dead cork from a plant
Used microscopes to do so
Zacharias Jansen

Janssen has been associated with invention of the single-lens
(simple) optical microscope and the compound (2 or more lens) 9x
magnification optical microscope, sometimes claimed to have
been devised with the help of his father (or sometimes said to have
been built entirely by his father) with a date of invention commonly
given as 1590 (or sometimes 1595), while trying to find a way to
make magnification even greater to help people with seriously poor
eyesight.
Zacharias Jansen

Created the single-lens microscope

Created the compound light microscope
Leading to
Anton van Leeuwenhoek

Leeuwenhoek was a fantastic lens creator. He maintained throughout his life
that there are aspects of microscope construction "which I only keep for myself",
in particular his most critical secret of how he created lenses. For many years noone was able to reconstruct Leeuwenhoek's design techniques. However, in
1957 C.L. Stong used thin glass thread fusing instead of polishing, and
successfully created some working samples of a Leeuwenhoek design
microscope.

Leeuwenhoek used samples and measurements to estimate numbers of
microorganisms in units of water. He studied a broad range of microscopic
phenomena, and shared the resulting observations freely with groups such as
the English Royal Society. Such work firmly established his place in history as one
of the first and most important explorers of the microscopic world. He was one of
the first people to discover cells, along with Robert Hooke.

Leeuwenhoek's main discoveries are:
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the infusoria (protists) in 1674
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the bacteria, (e.g. from the human mouth), in 1676
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the vacuole of the cell.
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the spermatozoa in 1677.
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the banded pattern of muscular fibers, in 1682
Anton van Leeuwenhoek

Contributed a lot of discovers to science using a microscope

Used the word “animalcules” to describe them

Saw protists and bacteria
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First to see living cells
Theodor Schwann, Matthias
Schleiden, and Rudolf Virchow

In 1837, Schleiden found that all plants are composed of cells, and
communicated the finding to Schwann, who had found similar
structures in the cells of the notochord, as shown earlier by Müller.
Other researchers confirmed the similarity, as explained in
Schwann's Microscopic Investigations on the Accordance in the
Structure and Growth of Plants and Animals, where he concluded,
"All living things are composed of cells and cell products“

While a professor of botany at the University of Jena, Schleiden
wrote Contributions to Phytogenesis (1838), in which he stated that
the different parts of the plant organism are composed of cells.

Rudolf Virchow contributed to this theory and he found that cells
come from other living cells.
Theodor Schwann, Matthias
Schleiden, and Rudolf Virchow

Formed the foundation of the cell theory

Stated that:

All plants are made of cells (Schleiden)
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All animals are made of cells (Schwann)
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Suggested that cells are the basic unit of life
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Found that cells come from other cells (Virchow)
The Cell Theory
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What do you think are parts of the cell theory?
What properties do you think ALL cells must
have? (Based on your thoughts and what we
went over)
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All living things are made of cells
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Cells are the basic unit of structure and
organization in an organism
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Cells only come from pre-existing cells
Alive or Not?
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A tall mountain
Yes or No
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A small bird
Yes or No
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A tiny bacterium
Yes or No
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A huge television
Yes or No
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Dry yeast
Yes or No
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Why are some alive and some not?
Videos
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http://www.youtube.com/watch?v=4OpBylwH9DU (the cell theory
and its history – Ted - Ed)
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http://www.youtube.com/watch?v=dscY_2QQbKU (live-action cell
theory video)
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https://www.youtube.com/watch?v=KuJqqiATlqw (Cell Theory Song)
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https://www.youtube.com/watch?v=BI6Gbyxq8eY (Mahalo.com)
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http://www.youtube.com/watch?v=X6N82No4Nz8 (Bill Nye – general
cell/organelle video)