Walden by Henry David Thoreau, uses an analogy element of style to illustrate a comparison.
A vascular cambium is a plant tissue between the xylem and phleom in the stems of a certain vascular plant. it's the line that separate the bark and the wood in vascular tree
1st detail: The vascular cambium produces pholeom and xylem; which are there to transport water to roots or stems it collected from the leaf.
2nd detail: The vascular cambium is a little layer of unspecialized mersitem cells that separate it also devides to from the second vascular tissues. The vascular cambium is made up of 2 type of cells Fusiform initials and Ray initials.
3rd detail: The vascular cambium is found in divots; which are flowering plants. But not in monocots. some type of leave also have vascular cambium.
4th detail: The phytohormones are involved in vascular activity; auxins, ethylene, gibberellins, cytokininis etc..
5th detail: The vascular cambium is maintaned by a network of interacting signal feedback loops, so the plant or tree could keep it's protection.
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