Dermal tissue

=Activity No # 1 - Observation of dermal tissue=

Estimated Time
30 minutes

Materials/ Resources needed
A Nerium leaf, a microscope, glass slide, cover slip, glass dish, methylene blue, glycerine, blotting paper etc.

Prerequisites/Instructions, if any
Peel out lower skin of nerium leaf and observe it under microscope.Observe few specialised structures and draw the diagram.

Process (How to do the activity)

 * Take a nerium leaf.
 * Break the leaf by stretching it so that a peel of skin from the lower epidermis projects out.Remove 2 to 3 pieces of peel and place it in a glass dish with water.
 * Select a very fine peel and place it on a glass slide.
 * Add 1 to 2 drops of methylene blue on the section and wash the extra stain with water.
 * Add 1 to 2 drops of glycerine and cover the section with a cover slip gently and remove the extra stain with a blotting paper.
 * Mount the slide on the microscope.

Developmental Questions (What discussion questions)

 * 1) Did you see some specialised structures in the slide?
 * 2) What are they called?
 * 3) what is the structure of stomata?

Evaluation (Questions for assessment of the child)

 * 1) What is the function of stomata?
 * 2) What is the function of guard cells of stomata?

Question Corner
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