Xylem tissue. Light micrograph (LM) of a section through sunflower(helianthus annuus) tissue showing spiral tracheids,a type of xylem. Tracheids are long tubular cells with lignin,a material that provides support,in the cell walls. Spiral thickening of the cells can be seen. Tracheids conduct water from the roots of a plant along the stems to the leaves. Magnification: x210 when printed 10cm wide | |
Licence : | Libre de droits |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |