Xylem plant cells. Coloured scanning electron micrograph (SEM) of a longitudinal section through the xylem in the stem of a woody plant. The xylem is mainly composed of tracheids (brown,centre). Tracheids are long tubular cells that have walls strengthened with lignin,a woody fibre that helps to support the structure of the plant. The xylem transports water and mineral nutrients from the roots throughout the plant. Magnification: x400 when printed 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4000 px × 3010 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |