Pondweed stem, light micrograph - HD 影片檔
Pondweed stem. Light micrograph of a transverse section through the stem of a pondweed (Potamogeton sp.) plant. At centre is the vascular system of xylem and phloem tissues. The cortex consists of parenchyma cells with large air spaces (lacunae, white circles). Magnification: x80 when printed at 10 centimetres wide.
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