Macrophotograph of a leaf skeleton of the ivy plant,Hedera helix. showing the branching pattern & decreasing size of the veins (vascular tissue). The vascular tissue comprises the xylem,supplying water & minerals from the roots to the leaves & the phloem,which conducts the sugar manufactured in the leaves during photosynthesis to the rest of the plant. The veins are preserved due to the presence of lignin,a polymer resistant to decay,in the xylem. Mag: X2 (at 35mm size) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3461 px × 5091 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |