DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Pine stem. Light micrograph of a section through the stem of a pine (Pinus sp.) tree, showing a resin duct (lacuna, large, centre) in xylem tissue. The surrounding tissue is parenchyma cells (red). The large circular lacuna is lined with parenchyma cells (light blue and red) that produce resin. Magnification: x132 when printed 10 centimetres wide.
Model release not required. Property release not available.