Product size: 42*30*30cm

Product weight: 4000g

Product material: PVC

product description:

This model shows the cross-section and longitudinal-section structure of a dicot stem, showing the epidermis, cortex, vascular bundles, pith, and pith rays in cross-section. The epidermal cells are closely arranged and keratinized, the cortical cells near the epidermis are thick and horny, and the inner ones are thin-walled. Vascular bundle phloem fibers, primary phloem, cambium and primary xylem. One side of the longitudinal section is peeled off in layers, showing the surface view of the epidermis, the thick horn and the parenchyma cells. The cross section of the vascular bundle shows conduits, sieve tubes, sieve plates and sieve holes; the longitudinal sections show structures such as annular conduits, threaded conduits, perforated conduits, sieve tubes and sieve plates. It is also marked with numbers and has corresponding text descriptions, which are suitable for visual teaching aids used in biology teaching in secondary schools.