Inside a leaf

1. READ/play the text
2. CLICK the picture (and video)
3. TRY this:

Q1: What happens on the lower side of a leaf?

[Answer]

Plants are made of cells. These are like tiny boxes about one tenth of a millimetre across.

When you look at them under a microscope you see the cell wall as a thick line which runs all around the cell. The cell wall is made of a substance called cellulose. It gives the cell support.

Leaves are made of different shapes of cells as you can see in this diagram.