This model shows the transverse and longitudinal section of a dicotyledonous stem in which case the cambium ring has been formed but no secondary growth has yet taken place. Useful model for study of epidermis, lentice, cork layer, cork cambium, cortical parenchyme, starch sheath, medullary rays, phloem, sieve plate, sieve plate, sieve tube, phloem parenchyma and inter fasicular cambium. xylem, pitted vessels, bordered pitted vessels,annular vessels,spiral vessels, pith etc. Mounted on base, with key card. Overall dimensions 480 x 170 x 440 mm.approx.