Phloem is actually composed of still-living cells that transport sap. Perhaps you are asking about xylem which is composed primarily of dead cells.
pith
PITH
phloem
i think it is called a snag or a dead tree
No, they are usually living. It is the xylem tissue that is made mostly of dead cells.
There is a layer of living Phloem and there is a layer of living xylem. Both these layer produce dead tissue, the Phloem produces bark (dead protective outer layer), the xylem produces wood (dead supportive inner layer). Both the wood and the bark are dead. It is only the two thin layers of Phloem and Xylem that are alive.
When the phloem is dead it causes bark to form on a tree. A secondary growth in the cortex result in the bark formation a a tree
PITH
Bark forms on a tree as a protective outer layer. It helps shield the tree from physical damage, pests, and disease. As the inner layers of the tree grow, the outer bark is pushed out and eventually replaced.
dead phloem causes bark to formon atree
in the middle of the tree
in xylem all the cells R dead IN PHLOEM EXCEPT PHLOEM FIBRES ALL R LIVING CELLS
phloem
the old phloem is called bark
No
tree trunks have xylem and phloem
i think it is called a snag or a dead tree
No, they are usually living. It is the xylem tissue that is made mostly of dead cells.