Collection of leaves. These are lit to emphasise the veins. Each vein is a vascular bundle,with the xylem and phloem surrounded by a sheath of lignin. The xylem carries water and minerals into the leaf,the phloem takes away the sap,with dissolved sugars produced by photosynthesis,away from the leaf | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 3663 px × 4886 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |