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(1) A type of vascular tissue in terrestrial plants composed of tracheary elements, tracheids and wood vessels and of additional xylem fibers, and is primarily involved in transporting water and nutrient (from the roots to the shoot and leaves) and providing structural support.

(2) The primary component of wood in plants.


Xylem in plants is the water conducting tissue in vascular plants. Based on the stage and origin of growth, a xylem may be primary or secondary.

Word origin: Greek xylon, "wood".

Compare: phloem

‘’See also:’’ softwood, hardwood

Related terms:

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Avascular Moss

Mosses are considered to be non-vascular plants because they lack xylem and phloem. The phloem and xylem are used to transport fluids and gases through vascular plants. Instead, in mosses, water is transported by cell-to-cell diffusion and this inefficient ...

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by BasicBiology
Tue Nov 18, 2014 1:01 am
Forum: Botany Discussion
Topic: Avascular Moss
Replies: 5
Views: 5816

Transpiration and Photosynthesis.

... requires water to happen. The water is photolysed (split apart) using the energy gained from sunlight, which will draw more up through the xylem from the roots. However more significantly for photosynthesis to take place there needs to be gas exchange through the stomatal pores predominantly ...

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by Babybel56
Fri Mar 14, 2014 4:07 am
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 4
Views: 5639

Why does the floem gets affected when the bark gets damaged?

*phloem! The phloem cells are loving cells, whilst the xylem are formed of dead cells. The xylem are on the inside of the vascular bundles, and eventually are used to create the dead heartwood at the centre of the trees. This means the phloem are always ...

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by Babybel56
Fri Feb 28, 2014 9:27 am
Forum: Botany Discussion
Topic: Why does the floem gets affected when the bark gets damaged?
Replies: 3
Views: 3512


... http://en.wikipedia.org/wiki/Trichoplax No two trees are the same shape, they do share a similar fractal organization, and specific structures (xylem, phloem, leaves, etc) are highly organized with tightly constrained shapes. Meanwhile, there is some definition to the shape of cyanobacteria, ...

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by BlahBlahBlah
Thu Jun 27, 2013 1:46 pm
Forum: Microbiology
Topic: Multicellular prokaryote
Replies: 27
Views: 41164

Monocot leaf cross section

yeah, it should be the phloem/xylem orientation

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by JackBean
Sun Dec 02, 2012 6:42 pm
Forum: Botany Discussion
Topic: Monocot leaf cross section
Replies: 1
Views: 3531
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