Dictionary » H » Heartwood




The central wood in a branch or stem characterized by being composed of dead cells, more resistant to decay, generally darker and harder than the outer wood.


The heartwood in comparison with sapwood is darker and harder as a result of the deposition of chemical substances such as gums, tannins, or pigments that may impart such colour. Because of that the heartwood is primarily important to plants for structural support.

Compare: sapwood

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

... 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 on the outside the trunk, just beneath the periderm (bark). If you take off the ...

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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: 3519

Transport In Plants

... consists of sieve cells , sieve tube elements , phloem parenchyma and phloem fibres. There are also phloem ray cells. Xylem consists of the inner heartwood (the dead part) and the outer portion called the sapwood (the mostly living part.) Xylem "wood" from the Greek xylon. The actual ...

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by kika
Tue Aug 02, 2011 10:40 am
Forum: Botany Discussion
Topic: Transport In Plants
Replies: 3
Views: 11661

need an answer

... side (the outer layer of a tree's bark) which is only several cell layers deep. Whereas the vascular cambium produces both secondary xylem(sapwood/heartwood) and secondary phloem(inner bark). Hope this helps :)

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by botanygirl
Thu Oct 25, 2007 2:47 pm
Forum: Botany Discussion
Topic: need an answer
Replies: 5
Views: 5906

?¿? Woody Dicot Question ?¿?

The center is called heartwood. And from the center to the periphery lie the rays that is responsible for secretion into the heartwood.

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by wtwt5237
Tue Jun 12, 2007 1:15 pm
Forum: Botany Discussion
Topic: ?¿? Woody Dicot Question ?¿?
Replies: 3
Views: 3066

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