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The most distinctive xylem cells are the long tracheary elements that transport water. Tracheids and vessel elements are distinguished by their shape; vessel elements are shorter, and are connected together into long tubes that are called vessels. [6] Xylem also contains two other type of cells: parenchyma and fibers. [7] Xylem can be found:
English: xylem (blue) carries water from the roots upwards phloem (orange) carries products of photosynthesis from the place of their origin (source) to organs where they are needed (roots, storage organs, flowers, fruits – sink); note that e.g. the storage organs may be source and leaves may be sink at the beginning of the growing season
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Added Companion cells. also aligned the numbers : 00:16, 13 November 2012: 512 × 384 (61 KB) Barakplasma: resized the elements in the image. Added Creative Commons attribution metadata. 00:09, 13 November 2012: 512 × 384 (56 KB) Barakplasma: Centered the image. 00:06, 13 November 2012: 512 × 384 (55 KB) Barakplasma: User created page with ...
English: A cross section of a leaf showing the phloem, xylem, sclerenchyma and collenchyma, and mesophyll. —Microscope images used— Xylem and phloem File:Lamium sp., stalk, Etzold green 5.jpg, by Micropix. Sclerenchyma and collenchyma File:Plant cell type sclerenchyma fibers.png and File:Plant cell type collenchyma.png, by Snowman frosty
Cross section of celery stalk, showing vascular bundles, which include both phloem and xylem Detail of the vasculature of a bramble leaf Translocation in vascular plants. Vascular tissue is a complex conducting tissue, formed of more than one cell type, found in vascular plants. The primary components of vascular tissue are the xylem and phloem ...
The presence of vessels in xylem has been considered to be one of the key innovations that led to the success of the flowering plants. It was once thought that vessel elements were an evolutionary innovation of flowering plants, but their absence from some basal angiosperms and their presence in some members of the Gnetales suggest that this hypothesis must be re-examined; vessel elements in ...
It is a type of conductive cell called a tracheary element. Angiosperms use another type of conductive cell, called vessel elements, to transport water through the xylem. The main functions of tracheid cells are to transport water and inorganic salts, and to provide structural support for trees.