Pine Stem #2
by Dr Keith Wheeler/science Photo Library
Title
Pine Stem #2
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph - Photograph
Description
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 (orange-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: x70 when printed 10 centimetres wide.
Uploaded
September 25th, 2019
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