Pine stem. Light micrograph of a section through the stem of a pine (Pinus sp.) tree, showing tracheid cells (white-brown) in the xylem tissue. There


Pine stem. Light micrograph of a section through the stem of a pine (Pinus sp.) tree, showing tracheid cells (white-brown) in the xylem tissue. There are thin files of parenchyma and tracheid cells (yellow-white) of the subsidiary medullary rays, which pass food substances radially. Many of the tracheid cell walls have bordered pits (circles) that pass water and minerals side-ways. Magnification: x37 when printed 10 centimetres wide.


Size: 3417px × 5125px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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