Tinted SEM of Quercus robur
Numéro d’image : 11536426
| False-colour scanning electron micrograph of a vertical section through oak heartwood,the wood (secondary xylem) of the tree Quercus robur. The vertical tube-like structure (left) is a tracheary vessel which has become blocked by bladder-like ingrowths known as tyloses. In young sapwood the vessels carry water & nutrients from the roots to the leaves,but after a few years they become blocked & no longer carry sap. Large vessels like this occur in early (spring) wood; late-wood vessels are much smaller. The rest of the tissue seen in the image is wood parenchyma,an unspecialised matrix tissue. Oak is classified as a hardwood. Magnification: x300 at 35mm size | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
| Taille de l’image : | 5424 px × 3641 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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