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Discovering Cells

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by

Sarah Chrzanowski

on 9 September 2014

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Transcript of Discovering Cells

Anton van Leeuwenhoek
1683

Anton created his own microscope as well, which could magnify a specimen up to 266 times its size.
What do microscopes do?
Magnification
- making it
larger

Resolution
- making it
clearer
/ the

sharpness of an image.
Robert Hooke
One of the first people to observe cells using a microscope he built himself.
How does a microscope magnify (enlarge) something?
The convex lens/lenses are thicker in the middle and bend the light that passes through them.

The more lenses there are, the more the light bends and the larger the image appears.
Resolution
Being able to see fine detail.
Discovering Cells
Anton van Leeuwenhoek
He looked at water from a pond and found one-celled organisms.
Anton van Leeuwenhoek
He looked at scrapings from teeth and became the first person to see the single-celled organisms that are now called bacteria.
Microscope!
The invention of the microscope made it possible for people to discover and learn about cells.
Robert Hooke
1663
To discover the cells, he looked at cork, the bark of the cork oak tree, which had cells that were no longer alive.
All living things are made of cells. What are cells?
Cells
are the basic units of structure and function in living things.
Just as bricks are the building blocks of a house, cells are the building blocks of life.
You are alive, so you are made of cells!
A microscope is an instrument that makes small objects look larger.
The way the bricks are organized is similar to how cells are organized in certain organisms.
He was amazed at how many cells he saw in such a small area.
Found unicellular organisms
He discovered bacteria!
The convex lens causes the light rays to bend and come together
to make the image look larger.
When you look at a photo printed in a newspaper, it looks like a complete image. However,if you put it under a microscope, you see dots. You see the fine detail of the picture!
The Cell Theory
The cell theory states three ideas:


Cell Theory

#1

All living things are made of cells.
Cell Theory

#2

Cells are the basic unit of structure and function in living things.
#3

All cells come
from others cells.
Cell Theory
Full transcript