Young yew tree stem. Light micrograph of a transverse section through a one-year-old stem of a yew tree (Taxus baccata). The epidermis (outer layer) has thick-walled cells with a thick waterproof cuticle (green). The stem is furrowed to increase surface area for photosynthesis by the chlorenchyma cells of the outer cortex (pink). The vascular ring (centre) consists of phloem sieve cells (blue) on the outside and inner xylem tracheids (green-orange-blue). Magnification: x14 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 4790 px × 3697 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |