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Home > All Images > 1988 > April > 19 Apr 1988

Images Dated 19th April 1988

Choose from 10 pictures in our Images Dated 19th April 1988 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Section through stem of Oak tree Featured 19 Apr 1988 Print

Section through stem of Oak tree

Light micrograph of a transverse section of the stem of an oak tree Quercus robur. The micrograph shows the xylem, the part of the vascular bundle which is responsible for the transportation of water and minerals. The xylem appears here as yellow holes. The fine red lines radiating outwards consist of cells of the horizontal xylem called rays. The rays distribute water radially to the cambium and also act as storage centres for starch and lipids. The cells in the roundish area at left are pith cells, a region of parenchymatous tissue located at the centre of the stem of many plants. Magnification: x7 at 35mm size

© SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY