Inside a leaf
The diagram on the right shows what a leaf look like if you cut it across, and then look at the cut edge.
Waxy layer - it is on the leaf surface stops the leaf cells from drying out.
The upper epidermis- protects the cells inside the leaf.
The palisade layer -contains cells that do most of the photosynthesis.
The spongy layer has lots of air spaces . The cells in the spongy layer do a small amount of photosynthesis.
Stoma is a tiny hole in the lower epidermis. These holes let carbon dioxide from the air get into the leaf.
The lower epidermis protects the cells inside the leaf.
A vein carries water to the cells in the leaf.
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