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.

Cells

Eukaryotic Cells• have a nucleus• have organelles (compartments that enable a cell to

function and reproduce)

• Animal Cells• Fungi• Plants

Plant cell

Cell membrane

Examples of Eukaryotic cells

• Plant cells

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?

• A hypertonic solution the net movement of water is out of the cell

Types of SolutionsA hypotonic

solution the net movement of water is into 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 solutionThe contents of the cells have been reduced to the

spherical structures shown

Making a Crystal – Lab 26