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Cells
Cell Theory:
1. Every organism is composed of one or
more cells.
2. The cell is the smallest unit that has the
properties of life.
3. The continuity of life arises directly from
the growth and division of single cells.
Eukaryotic Cells
• have a nucleus
• have organelles (compartments that enable a cell to
function and reproduce)
• Animal Cells
• Fungi
• Plants
Examples of Eukaryotic cells
• Plant cells
Cell
membrane
Plant cell
Aquatic Plant - Elodea
Parts of the
Elodea Cell
Cell membrane
Osmosis and Diffusion in the
Elodea leaf
• Think about the 15% salt solution
• What is a plant cell made up of?
Types of Solutions
A hypotonic
solution the
net movement
of water is into
the cell
• A hypertonic
solution the net
movement of
water is out of the
cell
Piece of Elodea at 10X
Elodea at 40X
Normal Elodea cells at 100X with
the oil lens
Lab Procedure
What will you make happen!
Elodea cells in NaCl solution
The contents of the cells have been reduced to the
spherical structures shown
Making a Crystal – Lab 26