Optical Microscope

Hydrangea

In this thin section of Hydrangea stem, the central portion has evolved to transfer the nutrients and the water up the plant. The middle layer between the central portion and the external layer has evolved to store and photosynthesize basic sugars. The external layer is made of mostly dead cells protecting the internal structure of the plant.

The cracks on the surface of the external layer were torn during the dissection of the plant stem.

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