L14. EPIDERMIS CELLS

L14. Epidermis cells

1. Material

• 1 slide
• 1 cover slip
• Distilled water
• 10% salt water
• Scissors
• Needle

2. Objectives

• Identify the shape of epidermis cells
• Identify and explore the parts of stoma
• Measure dimensions of the entire cell and the stoma

3. Procedure

PLANTS CELLS OBSERVATION:

First of all cut the stalk of the leek and in the place of the cut, pull out the transparent part of the epidermis using forceps.

After, using the brush, place the peel onto the slide containing a drop of the water and take a cover slip and place it gently on the peel with the aid of a needle.
View it in the microscope.

After, describe the change in the shape of the cells and finally, draw a diagram with the part of a stome.

SALT TREATMENT:

First of all, prepare a 10% of salt solution and put the salt with a dropper on the left part of the slide.

Then, place a piece of cellulose paper in the opposite part of the cover slip, and let the dissolution to go through your sample.

4. Questions

1. What is the major function of a cell membrane?

2. What is the major function of the cell wall?

3. How does salt affect the cells shape? And the stomes?