In herbaceous plants it occurs in the vascular bundles which are often. Both xylem and phloem are complex conducting tissues composed of more than one type of cell.



Xylem Versus Phloem Bioninja

Start studying biology xylem cell plants y9.

Xylem tissue xylem cell diagram. The tissues composing xylem are tracheids tracheae or vessels fibres called xylem fibres or wood fibres and parenchyma referred to as xylem or wood parenchyma. The structure of xylem and phloem is also different. Learn vocabulary terms and more with flashcards games and other study tools.

When this happens the primary xylem cells die and lose. The word xylem is derived from the greek word xylon xylon meaning wood. Xylem tissue is made of some living and dead cells.

The best known xylem tissue is wood though it is found throughout a plant. Of the above mentioned elements only the parenchyma cells are living and the rest are dead. It carries water absorbed by roots from soil to different parts of the plant body.

The basic function of xylem is to transport water from roots to stems and leaves but it also transports nutrients. Mature xylem is made up of dead cells that do not have cell contents while phloem contains living cells albeit without nuclei. Dead cells called bast fibers surrounds both tissues.

The vascular cambium is the main growth tissue in the stems and roots of many plants specifically in dicots such as buttercups and oak trees gymnosperms such as pine trees as well as in certain vascular plantsit produces secondary xylem inwards towards the pith and secondary phloem outwards towards the bark. It is the specialized tissue of vascular plants that transports water and nutrients from the plant soil interface to stem and leaves and provides mechanical support and storage. In a mature flowering plant or tree most of the cells that make up the xylem are specialised cells.

However phloem is bidirectional and transports food and nutrients to all of the plant. Its job is to make sure water flows upward. Living parenchymatous cells are found in both.

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The xylem transports water and minerals from the roots up the plant stem and into the leaves. Xylem is one of the two types of transport tissue in vascular plants phloem being the other. Xylem formation begins when the actively dividing cells of growing root and shoot tips apical meristems give rise to primary xylemin woody plants secondary xylem constitutes the major part of a mature stem or root and is formed as the plant expands in girth and builds a ring of new xylem around the original primary xylem tissues.

Both are components of vascular tissues in plants that serve the purpose of transporting materials throughout the plant.



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