xylem tissue, longitudinal section, populus (cottonwood) stem, 100x at 35mm. the xylem vessels are sectioned longitudinally. shows spiral thickenings of the xylem cell walls. - 維管組織 個照片及圖片檔
a two-year old woody dicot stem (tilia, basswood) in cross section showing plant anatomy 25x - 維管組織 個照片及圖片檔年輪
illustration of cross-section through leaf, showing upper epidermis, palisade mesophyll, xylem vesse - 維管組織 幅插畫檔、美工圖案、卡通及圖標木質部
illustration of cross-section through leaf, showing upper epidermis, palisade mesophyll, xylem vesse - 維管組織 幅插畫檔、美工圖案、卡通及圖標
monocot stem (cross section) with scattered vascular bundles--greenbrier (smilax sp) 8x - 維管組織 個照片及圖片檔
anatomy of a herbaceous dicot stem--sunflower (helianthus annus) with 2 vascular bundles, 50x - 維管組織 個照片及圖片檔人體構造
