Wood of a primitive conifer,Auracaria
Numéro d’image : 11527483
| Light micrograph (radial longitudinal section) of the wood of a primitive conifer,Auracaria cunninghamia,the monkey puzzle tree. The micrograph shows pits (yellow & blue spots) within the tracheids (cylinder cells). Tracheids are relatively primitive,non-living cells of the xylem. They are elongated with tapering ends & have thick lignified walls. They provide mechanical support & conduct water for the plant. Pits are cavities in the tracheids,which allow exchange of substances between adjacent cells. The thinner cross walls here are medullary rays. For a fossil ancestor of this conifer see E440/037. Magnification X40 at 35mm size | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Stammers, Sinclair |
| Taille de l’image : | 3503 px × 5315 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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