Pine root. Light micrograph of a section through the root of a pine (Pinus sp.) tree. From outer to inwards: outer layer of peridium (dark red); cortex - made up of parenchyma cells (red); ring of secondary phloem (blue); cambium (blue); secondary xylem - made up of tracheid cells (pink),scattered resin canals (blue,circular),and meullary rays (dark radial lines). The centre of the root is filled with small primary xylem cells (metaxylem,brown). Magnification: x5 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 5016 px × 3482 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |